Finally fixing it
06-01-2004, 12:54 PM
#151
Guest
Posts: n/a
Re: Finally fixing it
Well, yes and no, mostly no.
The PCV or CCV systems are balanced.
Basically that means that the flow rate on the PCV suction should match
the intake from the air filter and a little extra to suck fumes.
If the cover or the grommets are leaking or if the breather hole
suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
canister purge line hooked to the PCV line purges at idle, the PCV or
CCV gets overpowered and can't suck enough to do it's job.
This leads to oil blowing into the air filter. I just noticed I have to
do the CCV plastic line again on our Cherokee. There is oil dripping
out the bottom of the air filter box again. I did mine a couple years
ago and the CCV is just a tiny hose that plugs easy.
I described in another post to you how to check your canister purge.
Mike
Jim85CJ wrote:
>
> That makes sense...
> I'm afraid to ask this question... When I have the PCV breather out, it
> looks like smoke or steam coming out of the hole. I know the PCV valve
> works (when I take it out of the valve cover and put my thumb over it
> there is a strong suction). Should anything come out the PCV breather hole?
>
> Mike Romain wrote:
>
> > Think on where the oil is coming from inside the engine. It comes out
> > the top of the rockers via a hollow push rod. The rockers then fling
> > the oil up at the valve cover.
> >
> > The baffle on the stock one picks up air down near the head, the Al one
> > picks up the splash at the top.
> >
> > Mike
> >
> > Jim85CJ wrote:
> >
> >>really? It looks like the original has a direct route for the oil to
> >>take. The aluminum one seems to block the oil more. I guess the first
> >>thing I need to do is figure out why I get oil in the air filter :-).
> >>
> >>Mike Romain wrote:
> >>
> >>
> >>>I would think the original is better. That looks like a design
> >>>compromise on the aluminum cover.
> >>>
> >>>The aftermarket one I bought matched my stock one exactly except for the
> >>>color, this one is black, the stock one was AMC green.
> >>>
> >>>Mike
> >>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>>88 Cherokee 235 BFG AT's
> >>>
> >>>Jim85CJ wrote:
> >>>
> >>>
> >>>>Here are the pics I wanted to see...
> >>>>here's the one I have:
> >>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
> >>>>This one looks like it would work better:
> >>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
> >>>>
> >>>>http://www.sierrajeep.com/aluminum.htm
> >>>>
> >>>>Jim85CJ wrote:
> >>>>
> >>>>
> >>>>
> >>>>>Does anyone have a pic of the underside of their valve cover? The one I
> >>>>>removed is not original so I'm wondering if there is any difference.
> >>>>>
> >>>>>Jim85CJ wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
> >>>>>>258. From what I've gathered here I should get a new cork gasket and
> >>>>>>sandwich it between layers of RTV. Couple of questions: What should I
> >>>>>>use to clean the surfaces that will get the RTV? Is there any brand
> >>>>>>or type of RTV that is best for this or is it all the same?
> >>>>>>
> >>>>>
The PCV or CCV systems are balanced.
Basically that means that the flow rate on the PCV suction should match
the intake from the air filter and a little extra to suck fumes.
If the cover or the grommets are leaking or if the breather hole
suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
canister purge line hooked to the PCV line purges at idle, the PCV or
CCV gets overpowered and can't suck enough to do it's job.
This leads to oil blowing into the air filter. I just noticed I have to
do the CCV plastic line again on our Cherokee. There is oil dripping
out the bottom of the air filter box again. I did mine a couple years
ago and the CCV is just a tiny hose that plugs easy.
I described in another post to you how to check your canister purge.
Mike
Jim85CJ wrote:
>
> That makes sense...
> I'm afraid to ask this question... When I have the PCV breather out, it
> looks like smoke or steam coming out of the hole. I know the PCV valve
> works (when I take it out of the valve cover and put my thumb over it
> there is a strong suction). Should anything come out the PCV breather hole?
>
> Mike Romain wrote:
>
> > Think on where the oil is coming from inside the engine. It comes out
> > the top of the rockers via a hollow push rod. The rockers then fling
> > the oil up at the valve cover.
> >
> > The baffle on the stock one picks up air down near the head, the Al one
> > picks up the splash at the top.
> >
> > Mike
> >
> > Jim85CJ wrote:
> >
> >>really? It looks like the original has a direct route for the oil to
> >>take. The aluminum one seems to block the oil more. I guess the first
> >>thing I need to do is figure out why I get oil in the air filter :-).
> >>
> >>Mike Romain wrote:
> >>
> >>
> >>>I would think the original is better. That looks like a design
> >>>compromise on the aluminum cover.
> >>>
> >>>The aftermarket one I bought matched my stock one exactly except for the
> >>>color, this one is black, the stock one was AMC green.
> >>>
> >>>Mike
> >>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>>88 Cherokee 235 BFG AT's
> >>>
> >>>Jim85CJ wrote:
> >>>
> >>>
> >>>>Here are the pics I wanted to see...
> >>>>here's the one I have:
> >>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
> >>>>This one looks like it would work better:
> >>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
> >>>>
> >>>>http://www.sierrajeep.com/aluminum.htm
> >>>>
> >>>>Jim85CJ wrote:
> >>>>
> >>>>
> >>>>
> >>>>>Does anyone have a pic of the underside of their valve cover? The one I
> >>>>>removed is not original so I'm wondering if there is any difference.
> >>>>>
> >>>>>Jim85CJ wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
> >>>>>>258. From what I've gathered here I should get a new cork gasket and
> >>>>>>sandwich it between layers of RTV. Couple of questions: What should I
> >>>>>>use to clean the surfaces that will get the RTV? Is there any brand
> >>>>>>or type of RTV that is best for this or is it all the same?
> >>>>>>
> >>>>>
06-01-2004, 12:54 PM
#152
Guest
Posts: n/a
Re: Finally fixing it
Well, yes and no, mostly no.
The PCV or CCV systems are balanced.
Basically that means that the flow rate on the PCV suction should match
the intake from the air filter and a little extra to suck fumes.
If the cover or the grommets are leaking or if the breather hole
suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
canister purge line hooked to the PCV line purges at idle, the PCV or
CCV gets overpowered and can't suck enough to do it's job.
This leads to oil blowing into the air filter. I just noticed I have to
do the CCV plastic line again on our Cherokee. There is oil dripping
out the bottom of the air filter box again. I did mine a couple years
ago and the CCV is just a tiny hose that plugs easy.
I described in another post to you how to check your canister purge.
Mike
Jim85CJ wrote:
>
> That makes sense...
> I'm afraid to ask this question... When I have the PCV breather out, it
> looks like smoke or steam coming out of the hole. I know the PCV valve
> works (when I take it out of the valve cover and put my thumb over it
> there is a strong suction). Should anything come out the PCV breather hole?
>
> Mike Romain wrote:
>
> > Think on where the oil is coming from inside the engine. It comes out
> > the top of the rockers via a hollow push rod. The rockers then fling
> > the oil up at the valve cover.
> >
> > The baffle on the stock one picks up air down near the head, the Al one
> > picks up the splash at the top.
> >
> > Mike
> >
> > Jim85CJ wrote:
> >
> >>really? It looks like the original has a direct route for the oil to
> >>take. The aluminum one seems to block the oil more. I guess the first
> >>thing I need to do is figure out why I get oil in the air filter :-).
> >>
> >>Mike Romain wrote:
> >>
> >>
> >>>I would think the original is better. That looks like a design
> >>>compromise on the aluminum cover.
> >>>
> >>>The aftermarket one I bought matched my stock one exactly except for the
> >>>color, this one is black, the stock one was AMC green.
> >>>
> >>>Mike
> >>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>>88 Cherokee 235 BFG AT's
> >>>
> >>>Jim85CJ wrote:
> >>>
> >>>
> >>>>Here are the pics I wanted to see...
> >>>>here's the one I have:
> >>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
> >>>>This one looks like it would work better:
> >>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
> >>>>
> >>>>http://www.sierrajeep.com/aluminum.htm
> >>>>
> >>>>Jim85CJ wrote:
> >>>>
> >>>>
> >>>>
> >>>>>Does anyone have a pic of the underside of their valve cover? The one I
> >>>>>removed is not original so I'm wondering if there is any difference.
> >>>>>
> >>>>>Jim85CJ wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
> >>>>>>258. From what I've gathered here I should get a new cork gasket and
> >>>>>>sandwich it between layers of RTV. Couple of questions: What should I
> >>>>>>use to clean the surfaces that will get the RTV? Is there any brand
> >>>>>>or type of RTV that is best for this or is it all the same?
> >>>>>>
> >>>>>
The PCV or CCV systems are balanced.
Basically that means that the flow rate on the PCV suction should match
the intake from the air filter and a little extra to suck fumes.
If the cover or the grommets are leaking or if the breather hole
suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
canister purge line hooked to the PCV line purges at idle, the PCV or
CCV gets overpowered and can't suck enough to do it's job.
This leads to oil blowing into the air filter. I just noticed I have to
do the CCV plastic line again on our Cherokee. There is oil dripping
out the bottom of the air filter box again. I did mine a couple years
ago and the CCV is just a tiny hose that plugs easy.
I described in another post to you how to check your canister purge.
Mike
Jim85CJ wrote:
>
> That makes sense...
> I'm afraid to ask this question... When I have the PCV breather out, it
> looks like smoke or steam coming out of the hole. I know the PCV valve
> works (when I take it out of the valve cover and put my thumb over it
> there is a strong suction). Should anything come out the PCV breather hole?
>
> Mike Romain wrote:
>
> > Think on where the oil is coming from inside the engine. It comes out
> > the top of the rockers via a hollow push rod. The rockers then fling
> > the oil up at the valve cover.
> >
> > The baffle on the stock one picks up air down near the head, the Al one
> > picks up the splash at the top.
> >
> > Mike
> >
> > Jim85CJ wrote:
> >
> >>really? It looks like the original has a direct route for the oil to
> >>take. The aluminum one seems to block the oil more. I guess the first
> >>thing I need to do is figure out why I get oil in the air filter :-).
> >>
> >>Mike Romain wrote:
> >>
> >>
> >>>I would think the original is better. That looks like a design
> >>>compromise on the aluminum cover.
> >>>
> >>>The aftermarket one I bought matched my stock one exactly except for the
> >>>color, this one is black, the stock one was AMC green.
> >>>
> >>>Mike
> >>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>>88 Cherokee 235 BFG AT's
> >>>
> >>>Jim85CJ wrote:
> >>>
> >>>
> >>>>Here are the pics I wanted to see...
> >>>>here's the one I have:
> >>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
> >>>>This one looks like it would work better:
> >>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
> >>>>
> >>>>http://www.sierrajeep.com/aluminum.htm
> >>>>
> >>>>Jim85CJ wrote:
> >>>>
> >>>>
> >>>>
> >>>>>Does anyone have a pic of the underside of their valve cover? The one I
> >>>>>removed is not original so I'm wondering if there is any difference.
> >>>>>
> >>>>>Jim85CJ wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
> >>>>>>258. From what I've gathered here I should get a new cork gasket and
> >>>>>>sandwich it between layers of RTV. Couple of questions: What should I
> >>>>>>use to clean the surfaces that will get the RTV? Is there any brand
> >>>>>>or type of RTV that is best for this or is it all the same?
> >>>>>>
> >>>>>
06-01-2004, 12:54 PM
#153
Guest
Posts: n/a
Re: Finally fixing it
Well, yes and no, mostly no.
The PCV or CCV systems are balanced.
Basically that means that the flow rate on the PCV suction should match
the intake from the air filter and a little extra to suck fumes.
If the cover or the grommets are leaking or if the breather hole
suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
canister purge line hooked to the PCV line purges at idle, the PCV or
CCV gets overpowered and can't suck enough to do it's job.
This leads to oil blowing into the air filter. I just noticed I have to
do the CCV plastic line again on our Cherokee. There is oil dripping
out the bottom of the air filter box again. I did mine a couple years
ago and the CCV is just a tiny hose that plugs easy.
I described in another post to you how to check your canister purge.
Mike
Jim85CJ wrote:
>
> That makes sense...
> I'm afraid to ask this question... When I have the PCV breather out, it
> looks like smoke or steam coming out of the hole. I know the PCV valve
> works (when I take it out of the valve cover and put my thumb over it
> there is a strong suction). Should anything come out the PCV breather hole?
>
> Mike Romain wrote:
>
> > Think on where the oil is coming from inside the engine. It comes out
> > the top of the rockers via a hollow push rod. The rockers then fling
> > the oil up at the valve cover.
> >
> > The baffle on the stock one picks up air down near the head, the Al one
> > picks up the splash at the top.
> >
> > Mike
> >
> > Jim85CJ wrote:
> >
> >>really? It looks like the original has a direct route for the oil to
> >>take. The aluminum one seems to block the oil more. I guess the first
> >>thing I need to do is figure out why I get oil in the air filter :-).
> >>
> >>Mike Romain wrote:
> >>
> >>
> >>>I would think the original is better. That looks like a design
> >>>compromise on the aluminum cover.
> >>>
> >>>The aftermarket one I bought matched my stock one exactly except for the
> >>>color, this one is black, the stock one was AMC green.
> >>>
> >>>Mike
> >>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>>88 Cherokee 235 BFG AT's
> >>>
> >>>Jim85CJ wrote:
> >>>
> >>>
> >>>>Here are the pics I wanted to see...
> >>>>here's the one I have:
> >>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
> >>>>This one looks like it would work better:
> >>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
> >>>>
> >>>>http://www.sierrajeep.com/aluminum.htm
> >>>>
> >>>>Jim85CJ wrote:
> >>>>
> >>>>
> >>>>
> >>>>>Does anyone have a pic of the underside of their valve cover? The one I
> >>>>>removed is not original so I'm wondering if there is any difference.
> >>>>>
> >>>>>Jim85CJ wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
> >>>>>>258. From what I've gathered here I should get a new cork gasket and
> >>>>>>sandwich it between layers of RTV. Couple of questions: What should I
> >>>>>>use to clean the surfaces that will get the RTV? Is there any brand
> >>>>>>or type of RTV that is best for this or is it all the same?
> >>>>>>
> >>>>>
The PCV or CCV systems are balanced.
Basically that means that the flow rate on the PCV suction should match
the intake from the air filter and a little extra to suck fumes.
If the cover or the grommets are leaking or if the breather hole
suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
canister purge line hooked to the PCV line purges at idle, the PCV or
CCV gets overpowered and can't suck enough to do it's job.
This leads to oil blowing into the air filter. I just noticed I have to
do the CCV plastic line again on our Cherokee. There is oil dripping
out the bottom of the air filter box again. I did mine a couple years
ago and the CCV is just a tiny hose that plugs easy.
I described in another post to you how to check your canister purge.
Mike
Jim85CJ wrote:
>
> That makes sense...
> I'm afraid to ask this question... When I have the PCV breather out, it
> looks like smoke or steam coming out of the hole. I know the PCV valve
> works (when I take it out of the valve cover and put my thumb over it
> there is a strong suction). Should anything come out the PCV breather hole?
>
> Mike Romain wrote:
>
> > Think on where the oil is coming from inside the engine. It comes out
> > the top of the rockers via a hollow push rod. The rockers then fling
> > the oil up at the valve cover.
> >
> > The baffle on the stock one picks up air down near the head, the Al one
> > picks up the splash at the top.
> >
> > Mike
> >
> > Jim85CJ wrote:
> >
> >>really? It looks like the original has a direct route for the oil to
> >>take. The aluminum one seems to block the oil more. I guess the first
> >>thing I need to do is figure out why I get oil in the air filter :-).
> >>
> >>Mike Romain wrote:
> >>
> >>
> >>>I would think the original is better. That looks like a design
> >>>compromise on the aluminum cover.
> >>>
> >>>The aftermarket one I bought matched my stock one exactly except for the
> >>>color, this one is black, the stock one was AMC green.
> >>>
> >>>Mike
> >>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>>88 Cherokee 235 BFG AT's
> >>>
> >>>Jim85CJ wrote:
> >>>
> >>>
> >>>>Here are the pics I wanted to see...
> >>>>here's the one I have:
> >>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
> >>>>This one looks like it would work better:
> >>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
> >>>>
> >>>>http://www.sierrajeep.com/aluminum.htm
> >>>>
> >>>>Jim85CJ wrote:
> >>>>
> >>>>
> >>>>
> >>>>>Does anyone have a pic of the underside of their valve cover? The one I
> >>>>>removed is not original so I'm wondering if there is any difference.
> >>>>>
> >>>>>Jim85CJ wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
> >>>>>>258. From what I've gathered here I should get a new cork gasket and
> >>>>>>sandwich it between layers of RTV. Couple of questions: What should I
> >>>>>>use to clean the surfaces that will get the RTV? Is there any brand
> >>>>>>or type of RTV that is best for this or is it all the same?
> >>>>>>
> >>>>>
06-01-2004, 01:58 PM
#154
Guest
Posts: n/a
Re: Finally fixing it
"I described in another post to you how to check your canister purge"
I have that printed out and will check next time I can get greasy (2
kids, one only 18 months old... Mom runs around with the older one and I
get to watch the baby... not good to be real greasy all the time. Makes
car repairs tough (basically I get to work on the Jeep during naps)).
Mike Romain wrote:
> Well, yes and no, mostly no.
>
> The PCV or CCV systems are balanced.
>
> Basically that means that the flow rate on the PCV suction should match
> the intake from the air filter and a little extra to suck fumes.
>
> If the cover or the grommets are leaking or if the breather hole
> suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
> canister purge line hooked to the PCV line purges at idle, the PCV or
> CCV gets overpowered and can't suck enough to do it's job.
>
> This leads to oil blowing into the air filter. I just noticed I have to
> do the CCV plastic line again on our Cherokee. There is oil dripping
> out the bottom of the air filter box again. I did mine a couple years
> ago and the CCV is just a tiny hose that plugs easy.
>
> I described in another post to you how to check your canister purge.
>
> Mike
>
> Jim85CJ wrote:
>
>>That makes sense...
>>I'm afraid to ask this question... When I have the PCV breather out, it
>>looks like smoke or steam coming out of the hole. I know the PCV valve
>>works (when I take it out of the valve cover and put my thumb over it
>>there is a strong suction). Should anything come out the PCV breather hole?
>>
>>Mike Romain wrote:
>>
>>
>>>Think on where the oil is coming from inside the engine. It comes out
>>>the top of the rockers via a hollow push rod. The rockers then fling
>>>the oil up at the valve cover.
>>>
>>>The baffle on the stock one picks up air down near the head, the Al one
>>>picks up the splash at the top.
>>>
>>>Mike
>>>
>>>Jim85CJ wrote:
>>>
>>>
>>>>really? It looks like the original has a direct route for the oil to
>>>>take. The aluminum one seems to block the oil more. I guess the first
>>>>thing I need to do is figure out why I get oil in the air filter :-).
>>>>
>>>>Mike Romain wrote:
>>>>
>>>>
>>>>
>>>>>I would think the original is better. That looks like a design
>>>>>compromise on the aluminum cover.
>>>>>
>>>>>The aftermarket one I bought matched my stock one exactly except for the
>>>>>color, this one is black, the stock one was AMC green.
>>>>>
>>>>>Mike
>>>>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>>88 Cherokee 235 BFG AT's
>>>>>
>>>>>Jim85CJ wrote:
>>>>>
>>>>>
>>>>>
>>>>>>Here are the pics I wanted to see...
>>>>>>here's the one I have:
>>>>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
>>>>>>This one looks like it would work better:
>>>>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
>>>>>>
>>>>>>http://www.sierrajeep.com/aluminum.htm
>>>>>>
>>>>>>Jim85CJ wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>Does anyone have a pic of the underside of their valve cover? The one I
>>>>>>>removed is not original so I'm wondering if there is any difference.
>>>>>>>
>>>>>>>Jim85CJ wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
>>>>>>>>258. From what I've gathered here I should get a new cork gasket and
>>>>>>>>sandwich it between layers of RTV. Couple of questions: What should I
>>>>>>>>use to clean the surfaces that will get the RTV? Is there any brand
>>>>>>>>or type of RTV that is best for this or is it all the same?
>>>>>>>>
>>>>>>>
I have that printed out and will check next time I can get greasy (2
kids, one only 18 months old... Mom runs around with the older one and I
get to watch the baby... not good to be real greasy all the time. Makes
car repairs tough (basically I get to work on the Jeep during naps)).
Mike Romain wrote:
> Well, yes and no, mostly no.
>
> The PCV or CCV systems are balanced.
>
> Basically that means that the flow rate on the PCV suction should match
> the intake from the air filter and a little extra to suck fumes.
>
> If the cover or the grommets are leaking or if the breather hole
> suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
> canister purge line hooked to the PCV line purges at idle, the PCV or
> CCV gets overpowered and can't suck enough to do it's job.
>
> This leads to oil blowing into the air filter. I just noticed I have to
> do the CCV plastic line again on our Cherokee. There is oil dripping
> out the bottom of the air filter box again. I did mine a couple years
> ago and the CCV is just a tiny hose that plugs easy.
>
> I described in another post to you how to check your canister purge.
>
> Mike
>
> Jim85CJ wrote:
>
>>That makes sense...
>>I'm afraid to ask this question... When I have the PCV breather out, it
>>looks like smoke or steam coming out of the hole. I know the PCV valve
>>works (when I take it out of the valve cover and put my thumb over it
>>there is a strong suction). Should anything come out the PCV breather hole?
>>
>>Mike Romain wrote:
>>
>>
>>>Think on where the oil is coming from inside the engine. It comes out
>>>the top of the rockers via a hollow push rod. The rockers then fling
>>>the oil up at the valve cover.
>>>
>>>The baffle on the stock one picks up air down near the head, the Al one
>>>picks up the splash at the top.
>>>
>>>Mike
>>>
>>>Jim85CJ wrote:
>>>
>>>
>>>>really? It looks like the original has a direct route for the oil to
>>>>take. The aluminum one seems to block the oil more. I guess the first
>>>>thing I need to do is figure out why I get oil in the air filter :-).
>>>>
>>>>Mike Romain wrote:
>>>>
>>>>
>>>>
>>>>>I would think the original is better. That looks like a design
>>>>>compromise on the aluminum cover.
>>>>>
>>>>>The aftermarket one I bought matched my stock one exactly except for the
>>>>>color, this one is black, the stock one was AMC green.
>>>>>
>>>>>Mike
>>>>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>>88 Cherokee 235 BFG AT's
>>>>>
>>>>>Jim85CJ wrote:
>>>>>
>>>>>
>>>>>
>>>>>>Here are the pics I wanted to see...
>>>>>>here's the one I have:
>>>>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
>>>>>>This one looks like it would work better:
>>>>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
>>>>>>
>>>>>>http://www.sierrajeep.com/aluminum.htm
>>>>>>
>>>>>>Jim85CJ wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>Does anyone have a pic of the underside of their valve cover? The one I
>>>>>>>removed is not original so I'm wondering if there is any difference.
>>>>>>>
>>>>>>>Jim85CJ wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
>>>>>>>>258. From what I've gathered here I should get a new cork gasket and
>>>>>>>>sandwich it between layers of RTV. Couple of questions: What should I
>>>>>>>>use to clean the surfaces that will get the RTV? Is there any brand
>>>>>>>>or type of RTV that is best for this or is it all the same?
>>>>>>>>
>>>>>>>
06-01-2004, 01:58 PM
#155
Guest
Posts: n/a
Re: Finally fixing it
"I described in another post to you how to check your canister purge"
I have that printed out and will check next time I can get greasy (2
kids, one only 18 months old... Mom runs around with the older one and I
get to watch the baby... not good to be real greasy all the time. Makes
car repairs tough (basically I get to work on the Jeep during naps)).
Mike Romain wrote:
> Well, yes and no, mostly no.
>
> The PCV or CCV systems are balanced.
>
> Basically that means that the flow rate on the PCV suction should match
> the intake from the air filter and a little extra to suck fumes.
>
> If the cover or the grommets are leaking or if the breather hole
> suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
> canister purge line hooked to the PCV line purges at idle, the PCV or
> CCV gets overpowered and can't suck enough to do it's job.
>
> This leads to oil blowing into the air filter. I just noticed I have to
> do the CCV plastic line again on our Cherokee. There is oil dripping
> out the bottom of the air filter box again. I did mine a couple years
> ago and the CCV is just a tiny hose that plugs easy.
>
> I described in another post to you how to check your canister purge.
>
> Mike
>
> Jim85CJ wrote:
>
>>That makes sense...
>>I'm afraid to ask this question... When I have the PCV breather out, it
>>looks like smoke or steam coming out of the hole. I know the PCV valve
>>works (when I take it out of the valve cover and put my thumb over it
>>there is a strong suction). Should anything come out the PCV breather hole?
>>
>>Mike Romain wrote:
>>
>>
>>>Think on where the oil is coming from inside the engine. It comes out
>>>the top of the rockers via a hollow push rod. The rockers then fling
>>>the oil up at the valve cover.
>>>
>>>The baffle on the stock one picks up air down near the head, the Al one
>>>picks up the splash at the top.
>>>
>>>Mike
>>>
>>>Jim85CJ wrote:
>>>
>>>
>>>>really? It looks like the original has a direct route for the oil to
>>>>take. The aluminum one seems to block the oil more. I guess the first
>>>>thing I need to do is figure out why I get oil in the air filter :-).
>>>>
>>>>Mike Romain wrote:
>>>>
>>>>
>>>>
>>>>>I would think the original is better. That looks like a design
>>>>>compromise on the aluminum cover.
>>>>>
>>>>>The aftermarket one I bought matched my stock one exactly except for the
>>>>>color, this one is black, the stock one was AMC green.
>>>>>
>>>>>Mike
>>>>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>>88 Cherokee 235 BFG AT's
>>>>>
>>>>>Jim85CJ wrote:
>>>>>
>>>>>
>>>>>
>>>>>>Here are the pics I wanted to see...
>>>>>>here's the one I have:
>>>>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
>>>>>>This one looks like it would work better:
>>>>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
>>>>>>
>>>>>>http://www.sierrajeep.com/aluminum.htm
>>>>>>
>>>>>>Jim85CJ wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>Does anyone have a pic of the underside of their valve cover? The one I
>>>>>>>removed is not original so I'm wondering if there is any difference.
>>>>>>>
>>>>>>>Jim85CJ wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
>>>>>>>>258. From what I've gathered here I should get a new cork gasket and
>>>>>>>>sandwich it between layers of RTV. Couple of questions: What should I
>>>>>>>>use to clean the surfaces that will get the RTV? Is there any brand
>>>>>>>>or type of RTV that is best for this or is it all the same?
>>>>>>>>
>>>>>>>
I have that printed out and will check next time I can get greasy (2
kids, one only 18 months old... Mom runs around with the older one and I
get to watch the baby... not good to be real greasy all the time. Makes
car repairs tough (basically I get to work on the Jeep during naps)).
Mike Romain wrote:
> Well, yes and no, mostly no.
>
> The PCV or CCV systems are balanced.
>
> Basically that means that the flow rate on the PCV suction should match
> the intake from the air filter and a little extra to suck fumes.
>
> If the cover or the grommets are leaking or if the breather hole
> suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
> canister purge line hooked to the PCV line purges at idle, the PCV or
> CCV gets overpowered and can't suck enough to do it's job.
>
> This leads to oil blowing into the air filter. I just noticed I have to
> do the CCV plastic line again on our Cherokee. There is oil dripping
> out the bottom of the air filter box again. I did mine a couple years
> ago and the CCV is just a tiny hose that plugs easy.
>
> I described in another post to you how to check your canister purge.
>
> Mike
>
> Jim85CJ wrote:
>
>>That makes sense...
>>I'm afraid to ask this question... When I have the PCV breather out, it
>>looks like smoke or steam coming out of the hole. I know the PCV valve
>>works (when I take it out of the valve cover and put my thumb over it
>>there is a strong suction). Should anything come out the PCV breather hole?
>>
>>Mike Romain wrote:
>>
>>
>>>Think on where the oil is coming from inside the engine. It comes out
>>>the top of the rockers via a hollow push rod. The rockers then fling
>>>the oil up at the valve cover.
>>>
>>>The baffle on the stock one picks up air down near the head, the Al one
>>>picks up the splash at the top.
>>>
>>>Mike
>>>
>>>Jim85CJ wrote:
>>>
>>>
>>>>really? It looks like the original has a direct route for the oil to
>>>>take. The aluminum one seems to block the oil more. I guess the first
>>>>thing I need to do is figure out why I get oil in the air filter :-).
>>>>
>>>>Mike Romain wrote:
>>>>
>>>>
>>>>
>>>>>I would think the original is better. That looks like a design
>>>>>compromise on the aluminum cover.
>>>>>
>>>>>The aftermarket one I bought matched my stock one exactly except for the
>>>>>color, this one is black, the stock one was AMC green.
>>>>>
>>>>>Mike
>>>>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>>88 Cherokee 235 BFG AT's
>>>>>
>>>>>Jim85CJ wrote:
>>>>>
>>>>>
>>>>>
>>>>>>Here are the pics I wanted to see...
>>>>>>here's the one I have:
>>>>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
>>>>>>This one looks like it would work better:
>>>>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
>>>>>>
>>>>>>http://www.sierrajeep.com/aluminum.htm
>>>>>>
>>>>>>Jim85CJ wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>Does anyone have a pic of the underside of their valve cover? The one I
>>>>>>>removed is not original so I'm wondering if there is any difference.
>>>>>>>
>>>>>>>Jim85CJ wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
>>>>>>>>258. From what I've gathered here I should get a new cork gasket and
>>>>>>>>sandwich it between layers of RTV. Couple of questions: What should I
>>>>>>>>use to clean the surfaces that will get the RTV? Is there any brand
>>>>>>>>or type of RTV that is best for this or is it all the same?
>>>>>>>>
>>>>>>>
06-01-2004, 01:58 PM
#156
Guest
Posts: n/a
Re: Finally fixing it
"I described in another post to you how to check your canister purge"
I have that printed out and will check next time I can get greasy (2
kids, one only 18 months old... Mom runs around with the older one and I
get to watch the baby... not good to be real greasy all the time. Makes
car repairs tough (basically I get to work on the Jeep during naps)).
Mike Romain wrote:
> Well, yes and no, mostly no.
>
> The PCV or CCV systems are balanced.
>
> Basically that means that the flow rate on the PCV suction should match
> the intake from the air filter and a little extra to suck fumes.
>
> If the cover or the grommets are leaking or if the breather hole
> suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
> canister purge line hooked to the PCV line purges at idle, the PCV or
> CCV gets overpowered and can't suck enough to do it's job.
>
> This leads to oil blowing into the air filter. I just noticed I have to
> do the CCV plastic line again on our Cherokee. There is oil dripping
> out the bottom of the air filter box again. I did mine a couple years
> ago and the CCV is just a tiny hose that plugs easy.
>
> I described in another post to you how to check your canister purge.
>
> Mike
>
> Jim85CJ wrote:
>
>>That makes sense...
>>I'm afraid to ask this question... When I have the PCV breather out, it
>>looks like smoke or steam coming out of the hole. I know the PCV valve
>>works (when I take it out of the valve cover and put my thumb over it
>>there is a strong suction). Should anything come out the PCV breather hole?
>>
>>Mike Romain wrote:
>>
>>
>>>Think on where the oil is coming from inside the engine. It comes out
>>>the top of the rockers via a hollow push rod. The rockers then fling
>>>the oil up at the valve cover.
>>>
>>>The baffle on the stock one picks up air down near the head, the Al one
>>>picks up the splash at the top.
>>>
>>>Mike
>>>
>>>Jim85CJ wrote:
>>>
>>>
>>>>really? It looks like the original has a direct route for the oil to
>>>>take. The aluminum one seems to block the oil more. I guess the first
>>>>thing I need to do is figure out why I get oil in the air filter :-).
>>>>
>>>>Mike Romain wrote:
>>>>
>>>>
>>>>
>>>>>I would think the original is better. That looks like a design
>>>>>compromise on the aluminum cover.
>>>>>
>>>>>The aftermarket one I bought matched my stock one exactly except for the
>>>>>color, this one is black, the stock one was AMC green.
>>>>>
>>>>>Mike
>>>>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>>88 Cherokee 235 BFG AT's
>>>>>
>>>>>Jim85CJ wrote:
>>>>>
>>>>>
>>>>>
>>>>>>Here are the pics I wanted to see...
>>>>>>here's the one I have:
>>>>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
>>>>>>This one looks like it would work better:
>>>>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
>>>>>>
>>>>>>http://www.sierrajeep.com/aluminum.htm
>>>>>>
>>>>>>Jim85CJ wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>Does anyone have a pic of the underside of their valve cover? The one I
>>>>>>>removed is not original so I'm wondering if there is any difference.
>>>>>>>
>>>>>>>Jim85CJ wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
>>>>>>>>258. From what I've gathered here I should get a new cork gasket and
>>>>>>>>sandwich it between layers of RTV. Couple of questions: What should I
>>>>>>>>use to clean the surfaces that will get the RTV? Is there any brand
>>>>>>>>or type of RTV that is best for this or is it all the same?
>>>>>>>>
>>>>>>>
I have that printed out and will check next time I can get greasy (2
kids, one only 18 months old... Mom runs around with the older one and I
get to watch the baby... not good to be real greasy all the time. Makes
car repairs tough (basically I get to work on the Jeep during naps)).
Mike Romain wrote:
> Well, yes and no, mostly no.
>
> The PCV or CCV systems are balanced.
>
> Basically that means that the flow rate on the PCV suction should match
> the intake from the air filter and a little extra to suck fumes.
>
> If the cover or the grommets are leaking or if the breather hole
> suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
> canister purge line hooked to the PCV line purges at idle, the PCV or
> CCV gets overpowered and can't suck enough to do it's job.
>
> This leads to oil blowing into the air filter. I just noticed I have to
> do the CCV plastic line again on our Cherokee. There is oil dripping
> out the bottom of the air filter box again. I did mine a couple years
> ago and the CCV is just a tiny hose that plugs easy.
>
> I described in another post to you how to check your canister purge.
>
> Mike
>
> Jim85CJ wrote:
>
>>That makes sense...
>>I'm afraid to ask this question... When I have the PCV breather out, it
>>looks like smoke or steam coming out of the hole. I know the PCV valve
>>works (when I take it out of the valve cover and put my thumb over it
>>there is a strong suction). Should anything come out the PCV breather hole?
>>
>>Mike Romain wrote:
>>
>>
>>>Think on where the oil is coming from inside the engine. It comes out
>>>the top of the rockers via a hollow push rod. The rockers then fling
>>>the oil up at the valve cover.
>>>
>>>The baffle on the stock one picks up air down near the head, the Al one
>>>picks up the splash at the top.
>>>
>>>Mike
>>>
>>>Jim85CJ wrote:
>>>
>>>
>>>>really? It looks like the original has a direct route for the oil to
>>>>take. The aluminum one seems to block the oil more. I guess the first
>>>>thing I need to do is figure out why I get oil in the air filter :-).
>>>>
>>>>Mike Romain wrote:
>>>>
>>>>
>>>>
>>>>>I would think the original is better. That looks like a design
>>>>>compromise on the aluminum cover.
>>>>>
>>>>>The aftermarket one I bought matched my stock one exactly except for the
>>>>>color, this one is black, the stock one was AMC green.
>>>>>
>>>>>Mike
>>>>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>>88 Cherokee 235 BFG AT's
>>>>>
>>>>>Jim85CJ wrote:
>>>>>
>>>>>
>>>>>
>>>>>>Here are the pics I wanted to see...
>>>>>>here's the one I have:
>>>>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
>>>>>>This one looks like it would work better:
>>>>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
>>>>>>
>>>>>>http://www.sierrajeep.com/aluminum.htm
>>>>>>
>>>>>>Jim85CJ wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>Does anyone have a pic of the underside of their valve cover? The one I
>>>>>>>removed is not original so I'm wondering if there is any difference.
>>>>>>>
>>>>>>>Jim85CJ wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
>>>>>>>>258. From what I've gathered here I should get a new cork gasket and
>>>>>>>>sandwich it between layers of RTV. Couple of questions: What should I
>>>>>>>>use to clean the surfaces that will get the RTV? Is there any brand
>>>>>>>>or type of RTV that is best for this or is it all the same?
>>>>>>>>
>>>>>>>
06-01-2004, 01:58 PM
#157
Guest
Posts: n/a
Re: Finally fixing it
"I described in another post to you how to check your canister purge"
I have that printed out and will check next time I can get greasy (2
kids, one only 18 months old... Mom runs around with the older one and I
get to watch the baby... not good to be real greasy all the time. Makes
car repairs tough (basically I get to work on the Jeep during naps)).
Mike Romain wrote:
> Well, yes and no, mostly no.
>
> The PCV or CCV systems are balanced.
>
> Basically that means that the flow rate on the PCV suction should match
> the intake from the air filter and a little extra to suck fumes.
>
> If the cover or the grommets are leaking or if the breather hole
> suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
> canister purge line hooked to the PCV line purges at idle, the PCV or
> CCV gets overpowered and can't suck enough to do it's job.
>
> This leads to oil blowing into the air filter. I just noticed I have to
> do the CCV plastic line again on our Cherokee. There is oil dripping
> out the bottom of the air filter box again. I did mine a couple years
> ago and the CCV is just a tiny hose that plugs easy.
>
> I described in another post to you how to check your canister purge.
>
> Mike
>
> Jim85CJ wrote:
>
>>That makes sense...
>>I'm afraid to ask this question... When I have the PCV breather out, it
>>looks like smoke or steam coming out of the hole. I know the PCV valve
>>works (when I take it out of the valve cover and put my thumb over it
>>there is a strong suction). Should anything come out the PCV breather hole?
>>
>>Mike Romain wrote:
>>
>>
>>>Think on where the oil is coming from inside the engine. It comes out
>>>the top of the rockers via a hollow push rod. The rockers then fling
>>>the oil up at the valve cover.
>>>
>>>The baffle on the stock one picks up air down near the head, the Al one
>>>picks up the splash at the top.
>>>
>>>Mike
>>>
>>>Jim85CJ wrote:
>>>
>>>
>>>>really? It looks like the original has a direct route for the oil to
>>>>take. The aluminum one seems to block the oil more. I guess the first
>>>>thing I need to do is figure out why I get oil in the air filter :-).
>>>>
>>>>Mike Romain wrote:
>>>>
>>>>
>>>>
>>>>>I would think the original is better. That looks like a design
>>>>>compromise on the aluminum cover.
>>>>>
>>>>>The aftermarket one I bought matched my stock one exactly except for the
>>>>>color, this one is black, the stock one was AMC green.
>>>>>
>>>>>Mike
>>>>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>>88 Cherokee 235 BFG AT's
>>>>>
>>>>>Jim85CJ wrote:
>>>>>
>>>>>
>>>>>
>>>>>>Here are the pics I wanted to see...
>>>>>>here's the one I have:
>>>>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
>>>>>>This one looks like it would work better:
>>>>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
>>>>>>
>>>>>>http://www.sierrajeep.com/aluminum.htm
>>>>>>
>>>>>>Jim85CJ wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>Does anyone have a pic of the underside of their valve cover? The one I
>>>>>>>removed is not original so I'm wondering if there is any difference.
>>>>>>>
>>>>>>>Jim85CJ wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
>>>>>>>>258. From what I've gathered here I should get a new cork gasket and
>>>>>>>>sandwich it between layers of RTV. Couple of questions: What should I
>>>>>>>>use to clean the surfaces that will get the RTV? Is there any brand
>>>>>>>>or type of RTV that is best for this or is it all the same?
>>>>>>>>
>>>>>>>
I have that printed out and will check next time I can get greasy (2
kids, one only 18 months old... Mom runs around with the older one and I
get to watch the baby... not good to be real greasy all the time. Makes
car repairs tough (basically I get to work on the Jeep during naps)).
Mike Romain wrote:
> Well, yes and no, mostly no.
>
> The PCV or CCV systems are balanced.
>
> Basically that means that the flow rate on the PCV suction should match
> the intake from the air filter and a little extra to suck fumes.
>
> If the cover or the grommets are leaking or if the breather hole
> suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
> canister purge line hooked to the PCV line purges at idle, the PCV or
> CCV gets overpowered and can't suck enough to do it's job.
>
> This leads to oil blowing into the air filter. I just noticed I have to
> do the CCV plastic line again on our Cherokee. There is oil dripping
> out the bottom of the air filter box again. I did mine a couple years
> ago and the CCV is just a tiny hose that plugs easy.
>
> I described in another post to you how to check your canister purge.
>
> Mike
>
> Jim85CJ wrote:
>
>>That makes sense...
>>I'm afraid to ask this question... When I have the PCV breather out, it
>>looks like smoke or steam coming out of the hole. I know the PCV valve
>>works (when I take it out of the valve cover and put my thumb over it
>>there is a strong suction). Should anything come out the PCV breather hole?
>>
>>Mike Romain wrote:
>>
>>
>>>Think on where the oil is coming from inside the engine. It comes out
>>>the top of the rockers via a hollow push rod. The rockers then fling
>>>the oil up at the valve cover.
>>>
>>>The baffle on the stock one picks up air down near the head, the Al one
>>>picks up the splash at the top.
>>>
>>>Mike
>>>
>>>Jim85CJ wrote:
>>>
>>>
>>>>really? It looks like the original has a direct route for the oil to
>>>>take. The aluminum one seems to block the oil more. I guess the first
>>>>thing I need to do is figure out why I get oil in the air filter :-).
>>>>
>>>>Mike Romain wrote:
>>>>
>>>>
>>>>
>>>>>I would think the original is better. That looks like a design
>>>>>compromise on the aluminum cover.
>>>>>
>>>>>The aftermarket one I bought matched my stock one exactly except for the
>>>>>color, this one is black, the stock one was AMC green.
>>>>>
>>>>>Mike
>>>>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>>88 Cherokee 235 BFG AT's
>>>>>
>>>>>Jim85CJ wrote:
>>>>>
>>>>>
>>>>>
>>>>>>Here are the pics I wanted to see...
>>>>>>here's the one I have:
>>>>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
>>>>>>This one looks like it would work better:
>>>>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
>>>>>>
>>>>>>http://www.sierrajeep.com/aluminum.htm
>>>>>>
>>>>>>Jim85CJ wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>Does anyone have a pic of the underside of their valve cover? The one I
>>>>>>>removed is not original so I'm wondering if there is any difference.
>>>>>>>
>>>>>>>Jim85CJ wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
>>>>>>>>258. From what I've gathered here I should get a new cork gasket and
>>>>>>>>sandwich it between layers of RTV. Couple of questions: What should I
>>>>>>>>use to clean the surfaces that will get the RTV? Is there any brand
>>>>>>>>or type of RTV that is best for this or is it all the same?
>>>>>>>>
>>>>>>>
06-01-2004, 02:10 PM
#158
Guest
Posts: n/a
Re: Finally fixing it
I got one of those 'jolly jumper' body harnesses on a bunjy cord for our
son. The 'original' bunjy jumper. He spent many an afternoon tied up
to the tree in the driveway right at fender level so he could see and
even touch. He seemed to enjoy it. He loved playing with greasy
stuff... LOL!
But hey at 10 or 12 he was helping me swap head gaskets and now knows
how to do a 'glass body build on a CJ7....
Mike
Jim85CJ wrote:
>
> "I described in another post to you how to check your canister purge"
> I have that printed out and will check next time I can get greasy (2
> kids, one only 18 months old... Mom runs around with the older one and I
> get to watch the baby... not good to be real greasy all the time. Makes
> car repairs tough (basically I get to work on the Jeep during naps)).
>
> Mike Romain wrote:
> > Well, yes and no, mostly no.
> >
> > The PCV or CCV systems are balanced.
> >
> > Basically that means that the flow rate on the PCV suction should match
> > the intake from the air filter and a little extra to suck fumes.
> >
> > If the cover or the grommets are leaking or if the breather hole
> > suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
> > canister purge line hooked to the PCV line purges at idle, the PCV or
> > CCV gets overpowered and can't suck enough to do it's job.
> >
> > This leads to oil blowing into the air filter. I just noticed I have to
> > do the CCV plastic line again on our Cherokee. There is oil dripping
> > out the bottom of the air filter box again. I did mine a couple years
> > ago and the CCV is just a tiny hose that plugs easy.
> >
> > I described in another post to you how to check your canister purge.
> >
> > Mike
> >
> > Jim85CJ wrote:
> >
> >>That makes sense...
> >>I'm afraid to ask this question... When I have the PCV breather out, it
> >>looks like smoke or steam coming out of the hole. I know the PCV valve
> >>works (when I take it out of the valve cover and put my thumb over it
> >>there is a strong suction). Should anything come out the PCV breather hole?
> >>
> >>Mike Romain wrote:
> >>
> >>
> >>>Think on where the oil is coming from inside the engine. It comes out
> >>>the top of the rockers via a hollow push rod. The rockers then fling
> >>>the oil up at the valve cover.
> >>>
> >>>The baffle on the stock one picks up air down near the head, the Al one
> >>>picks up the splash at the top.
> >>>
> >>>Mike
> >>>
> >>>Jim85CJ wrote:
> >>>
> >>>
> >>>>really? It looks like the original has a direct route for the oil to
> >>>>take. The aluminum one seems to block the oil more. I guess the first
> >>>>thing I need to do is figure out why I get oil in the air filter :-).
> >>>>
> >>>>Mike Romain wrote:
> >>>>
> >>>>
> >>>>
> >>>>>I would think the original is better. That looks like a design
> >>>>>compromise on the aluminum cover.
> >>>>>
> >>>>>The aftermarket one I bought matched my stock one exactly except for the
> >>>>>color, this one is black, the stock one was AMC green.
> >>>>>
> >>>>>Mike
> >>>>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>>>>88 Cherokee 235 BFG AT's
> >>>>>
> >>>>>Jim85CJ wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>>>Here are the pics I wanted to see...
> >>>>>>here's the one I have:
> >>>>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
> >>>>>>This one looks like it would work better:
> >>>>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
> >>>>>>
> >>>>>>http://www.sierrajeep.com/aluminum.htm
> >>>>>>
> >>>>>>Jim85CJ wrote:
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>>Does anyone have a pic of the underside of their valve cover? The one I
> >>>>>>>removed is not original so I'm wondering if there is any difference.
> >>>>>>>
> >>>>>>>Jim85CJ wrote:
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
> >>>>>>>>258. From what I've gathered here I should get a new cork gasket and
> >>>>>>>>sandwich it between layers of RTV. Couple of questions: What should I
> >>>>>>>>use to clean the surfaces that will get the RTV? Is there any brand
> >>>>>>>>or type of RTV that is best for this or is it all the same?
> >>>>>>>>
> >>>>>>>
son. The 'original' bunjy jumper. He spent many an afternoon tied up
to the tree in the driveway right at fender level so he could see and
even touch. He seemed to enjoy it. He loved playing with greasy
stuff... LOL!
But hey at 10 or 12 he was helping me swap head gaskets and now knows
how to do a 'glass body build on a CJ7....
Mike
Jim85CJ wrote:
>
> "I described in another post to you how to check your canister purge"
> I have that printed out and will check next time I can get greasy (2
> kids, one only 18 months old... Mom runs around with the older one and I
> get to watch the baby... not good to be real greasy all the time. Makes
> car repairs tough (basically I get to work on the Jeep during naps)).
>
> Mike Romain wrote:
> > Well, yes and no, mostly no.
> >
> > The PCV or CCV systems are balanced.
> >
> > Basically that means that the flow rate on the PCV suction should match
> > the intake from the air filter and a little extra to suck fumes.
> >
> > If the cover or the grommets are leaking or if the breather hole
> > suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
> > canister purge line hooked to the PCV line purges at idle, the PCV or
> > CCV gets overpowered and can't suck enough to do it's job.
> >
> > This leads to oil blowing into the air filter. I just noticed I have to
> > do the CCV plastic line again on our Cherokee. There is oil dripping
> > out the bottom of the air filter box again. I did mine a couple years
> > ago and the CCV is just a tiny hose that plugs easy.
> >
> > I described in another post to you how to check your canister purge.
> >
> > Mike
> >
> > Jim85CJ wrote:
> >
> >>That makes sense...
> >>I'm afraid to ask this question... When I have the PCV breather out, it
> >>looks like smoke or steam coming out of the hole. I know the PCV valve
> >>works (when I take it out of the valve cover and put my thumb over it
> >>there is a strong suction). Should anything come out the PCV breather hole?
> >>
> >>Mike Romain wrote:
> >>
> >>
> >>>Think on where the oil is coming from inside the engine. It comes out
> >>>the top of the rockers via a hollow push rod. The rockers then fling
> >>>the oil up at the valve cover.
> >>>
> >>>The baffle on the stock one picks up air down near the head, the Al one
> >>>picks up the splash at the top.
> >>>
> >>>Mike
> >>>
> >>>Jim85CJ wrote:
> >>>
> >>>
> >>>>really? It looks like the original has a direct route for the oil to
> >>>>take. The aluminum one seems to block the oil more. I guess the first
> >>>>thing I need to do is figure out why I get oil in the air filter :-).
> >>>>
> >>>>Mike Romain wrote:
> >>>>
> >>>>
> >>>>
> >>>>>I would think the original is better. That looks like a design
> >>>>>compromise on the aluminum cover.
> >>>>>
> >>>>>The aftermarket one I bought matched my stock one exactly except for the
> >>>>>color, this one is black, the stock one was AMC green.
> >>>>>
> >>>>>Mike
> >>>>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>>>>88 Cherokee 235 BFG AT's
> >>>>>
> >>>>>Jim85CJ wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>>>Here are the pics I wanted to see...
> >>>>>>here's the one I have:
> >>>>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
> >>>>>>This one looks like it would work better:
> >>>>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
> >>>>>>
> >>>>>>http://www.sierrajeep.com/aluminum.htm
> >>>>>>
> >>>>>>Jim85CJ wrote:
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>>Does anyone have a pic of the underside of their valve cover? The one I
> >>>>>>>removed is not original so I'm wondering if there is any difference.
> >>>>>>>
> >>>>>>>Jim85CJ wrote:
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
> >>>>>>>>258. From what I've gathered here I should get a new cork gasket and
> >>>>>>>>sandwich it between layers of RTV. Couple of questions: What should I
> >>>>>>>>use to clean the surfaces that will get the RTV? Is there any brand
> >>>>>>>>or type of RTV that is best for this or is it all the same?
> >>>>>>>>
> >>>>>>>
06-01-2004, 02:10 PM
#159
Guest
Posts: n/a
Re: Finally fixing it
I got one of those 'jolly jumper' body harnesses on a bunjy cord for our
son. The 'original' bunjy jumper. He spent many an afternoon tied up
to the tree in the driveway right at fender level so he could see and
even touch. He seemed to enjoy it. He loved playing with greasy
stuff... LOL!
But hey at 10 or 12 he was helping me swap head gaskets and now knows
how to do a 'glass body build on a CJ7....
Mike
Jim85CJ wrote:
>
> "I described in another post to you how to check your canister purge"
> I have that printed out and will check next time I can get greasy (2
> kids, one only 18 months old... Mom runs around with the older one and I
> get to watch the baby... not good to be real greasy all the time. Makes
> car repairs tough (basically I get to work on the Jeep during naps)).
>
> Mike Romain wrote:
> > Well, yes and no, mostly no.
> >
> > The PCV or CCV systems are balanced.
> >
> > Basically that means that the flow rate on the PCV suction should match
> > the intake from the air filter and a little extra to suck fumes.
> >
> > If the cover or the grommets are leaking or if the breather hole
> > suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
> > canister purge line hooked to the PCV line purges at idle, the PCV or
> > CCV gets overpowered and can't suck enough to do it's job.
> >
> > This leads to oil blowing into the air filter. I just noticed I have to
> > do the CCV plastic line again on our Cherokee. There is oil dripping
> > out the bottom of the air filter box again. I did mine a couple years
> > ago and the CCV is just a tiny hose that plugs easy.
> >
> > I described in another post to you how to check your canister purge.
> >
> > Mike
> >
> > Jim85CJ wrote:
> >
> >>That makes sense...
> >>I'm afraid to ask this question... When I have the PCV breather out, it
> >>looks like smoke or steam coming out of the hole. I know the PCV valve
> >>works (when I take it out of the valve cover and put my thumb over it
> >>there is a strong suction). Should anything come out the PCV breather hole?
> >>
> >>Mike Romain wrote:
> >>
> >>
> >>>Think on where the oil is coming from inside the engine. It comes out
> >>>the top of the rockers via a hollow push rod. The rockers then fling
> >>>the oil up at the valve cover.
> >>>
> >>>The baffle on the stock one picks up air down near the head, the Al one
> >>>picks up the splash at the top.
> >>>
> >>>Mike
> >>>
> >>>Jim85CJ wrote:
> >>>
> >>>
> >>>>really? It looks like the original has a direct route for the oil to
> >>>>take. The aluminum one seems to block the oil more. I guess the first
> >>>>thing I need to do is figure out why I get oil in the air filter :-).
> >>>>
> >>>>Mike Romain wrote:
> >>>>
> >>>>
> >>>>
> >>>>>I would think the original is better. That looks like a design
> >>>>>compromise on the aluminum cover.
> >>>>>
> >>>>>The aftermarket one I bought matched my stock one exactly except for the
> >>>>>color, this one is black, the stock one was AMC green.
> >>>>>
> >>>>>Mike
> >>>>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>>>>88 Cherokee 235 BFG AT's
> >>>>>
> >>>>>Jim85CJ wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>>>Here are the pics I wanted to see...
> >>>>>>here's the one I have:
> >>>>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
> >>>>>>This one looks like it would work better:
> >>>>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
> >>>>>>
> >>>>>>http://www.sierrajeep.com/aluminum.htm
> >>>>>>
> >>>>>>Jim85CJ wrote:
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>>Does anyone have a pic of the underside of their valve cover? The one I
> >>>>>>>removed is not original so I'm wondering if there is any difference.
> >>>>>>>
> >>>>>>>Jim85CJ wrote:
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
> >>>>>>>>258. From what I've gathered here I should get a new cork gasket and
> >>>>>>>>sandwich it between layers of RTV. Couple of questions: What should I
> >>>>>>>>use to clean the surfaces that will get the RTV? Is there any brand
> >>>>>>>>or type of RTV that is best for this or is it all the same?
> >>>>>>>>
> >>>>>>>
son. The 'original' bunjy jumper. He spent many an afternoon tied up
to the tree in the driveway right at fender level so he could see and
even touch. He seemed to enjoy it. He loved playing with greasy
stuff... LOL!
But hey at 10 or 12 he was helping me swap head gaskets and now knows
how to do a 'glass body build on a CJ7....
Mike
Jim85CJ wrote:
>
> "I described in another post to you how to check your canister purge"
> I have that printed out and will check next time I can get greasy (2
> kids, one only 18 months old... Mom runs around with the older one and I
> get to watch the baby... not good to be real greasy all the time. Makes
> car repairs tough (basically I get to work on the Jeep during naps)).
>
> Mike Romain wrote:
> > Well, yes and no, mostly no.
> >
> > The PCV or CCV systems are balanced.
> >
> > Basically that means that the flow rate on the PCV suction should match
> > the intake from the air filter and a little extra to suck fumes.
> >
> > If the cover or the grommets are leaking or if the breather hole
> > suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
> > canister purge line hooked to the PCV line purges at idle, the PCV or
> > CCV gets overpowered and can't suck enough to do it's job.
> >
> > This leads to oil blowing into the air filter. I just noticed I have to
> > do the CCV plastic line again on our Cherokee. There is oil dripping
> > out the bottom of the air filter box again. I did mine a couple years
> > ago and the CCV is just a tiny hose that plugs easy.
> >
> > I described in another post to you how to check your canister purge.
> >
> > Mike
> >
> > Jim85CJ wrote:
> >
> >>That makes sense...
> >>I'm afraid to ask this question... When I have the PCV breather out, it
> >>looks like smoke or steam coming out of the hole. I know the PCV valve
> >>works (when I take it out of the valve cover and put my thumb over it
> >>there is a strong suction). Should anything come out the PCV breather hole?
> >>
> >>Mike Romain wrote:
> >>
> >>
> >>>Think on where the oil is coming from inside the engine. It comes out
> >>>the top of the rockers via a hollow push rod. The rockers then fling
> >>>the oil up at the valve cover.
> >>>
> >>>The baffle on the stock one picks up air down near the head, the Al one
> >>>picks up the splash at the top.
> >>>
> >>>Mike
> >>>
> >>>Jim85CJ wrote:
> >>>
> >>>
> >>>>really? It looks like the original has a direct route for the oil to
> >>>>take. The aluminum one seems to block the oil more. I guess the first
> >>>>thing I need to do is figure out why I get oil in the air filter :-).
> >>>>
> >>>>Mike Romain wrote:
> >>>>
> >>>>
> >>>>
> >>>>>I would think the original is better. That looks like a design
> >>>>>compromise on the aluminum cover.
> >>>>>
> >>>>>The aftermarket one I bought matched my stock one exactly except for the
> >>>>>color, this one is black, the stock one was AMC green.
> >>>>>
> >>>>>Mike
> >>>>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>>>>88 Cherokee 235 BFG AT's
> >>>>>
> >>>>>Jim85CJ wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>>>Here are the pics I wanted to see...
> >>>>>>here's the one I have:
> >>>>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
> >>>>>>This one looks like it would work better:
> >>>>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
> >>>>>>
> >>>>>>http://www.sierrajeep.com/aluminum.htm
> >>>>>>
> >>>>>>Jim85CJ wrote:
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>>Does anyone have a pic of the underside of their valve cover? The one I
> >>>>>>>removed is not original so I'm wondering if there is any difference.
> >>>>>>>
> >>>>>>>Jim85CJ wrote:
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
> >>>>>>>>258. From what I've gathered here I should get a new cork gasket and
> >>>>>>>>sandwich it between layers of RTV. Couple of questions: What should I
> >>>>>>>>use to clean the surfaces that will get the RTV? Is there any brand
> >>>>>>>>or type of RTV that is best for this or is it all the same?
> >>>>>>>>
> >>>>>>>
06-01-2004, 02:10 PM
#160
Guest
Posts: n/a
Re: Finally fixing it
I got one of those 'jolly jumper' body harnesses on a bunjy cord for our
son. The 'original' bunjy jumper. He spent many an afternoon tied up
to the tree in the driveway right at fender level so he could see and
even touch. He seemed to enjoy it. He loved playing with greasy
stuff... LOL!
But hey at 10 or 12 he was helping me swap head gaskets and now knows
how to do a 'glass body build on a CJ7....
Mike
Jim85CJ wrote:
>
> "I described in another post to you how to check your canister purge"
> I have that printed out and will check next time I can get greasy (2
> kids, one only 18 months old... Mom runs around with the older one and I
> get to watch the baby... not good to be real greasy all the time. Makes
> car repairs tough (basically I get to work on the Jeep during naps)).
>
> Mike Romain wrote:
> > Well, yes and no, mostly no.
> >
> > The PCV or CCV systems are balanced.
> >
> > Basically that means that the flow rate on the PCV suction should match
> > the intake from the air filter and a little extra to suck fumes.
> >
> > If the cover or the grommets are leaking or if the breather hole
> > suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
> > canister purge line hooked to the PCV line purges at idle, the PCV or
> > CCV gets overpowered and can't suck enough to do it's job.
> >
> > This leads to oil blowing into the air filter. I just noticed I have to
> > do the CCV plastic line again on our Cherokee. There is oil dripping
> > out the bottom of the air filter box again. I did mine a couple years
> > ago and the CCV is just a tiny hose that plugs easy.
> >
> > I described in another post to you how to check your canister purge.
> >
> > Mike
> >
> > Jim85CJ wrote:
> >
> >>That makes sense...
> >>I'm afraid to ask this question... When I have the PCV breather out, it
> >>looks like smoke or steam coming out of the hole. I know the PCV valve
> >>works (when I take it out of the valve cover and put my thumb over it
> >>there is a strong suction). Should anything come out the PCV breather hole?
> >>
> >>Mike Romain wrote:
> >>
> >>
> >>>Think on where the oil is coming from inside the engine. It comes out
> >>>the top of the rockers via a hollow push rod. The rockers then fling
> >>>the oil up at the valve cover.
> >>>
> >>>The baffle on the stock one picks up air down near the head, the Al one
> >>>picks up the splash at the top.
> >>>
> >>>Mike
> >>>
> >>>Jim85CJ wrote:
> >>>
> >>>
> >>>>really? It looks like the original has a direct route for the oil to
> >>>>take. The aluminum one seems to block the oil more. I guess the first
> >>>>thing I need to do is figure out why I get oil in the air filter :-).
> >>>>
> >>>>Mike Romain wrote:
> >>>>
> >>>>
> >>>>
> >>>>>I would think the original is better. That looks like a design
> >>>>>compromise on the aluminum cover.
> >>>>>
> >>>>>The aftermarket one I bought matched my stock one exactly except for the
> >>>>>color, this one is black, the stock one was AMC green.
> >>>>>
> >>>>>Mike
> >>>>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>>>>88 Cherokee 235 BFG AT's
> >>>>>
> >>>>>Jim85CJ wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>>>Here are the pics I wanted to see...
> >>>>>>here's the one I have:
> >>>>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
> >>>>>>This one looks like it would work better:
> >>>>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
> >>>>>>
> >>>>>>http://www.sierrajeep.com/aluminum.htm
> >>>>>>
> >>>>>>Jim85CJ wrote:
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>>Does anyone have a pic of the underside of their valve cover? The one I
> >>>>>>>removed is not original so I'm wondering if there is any difference.
> >>>>>>>
> >>>>>>>Jim85CJ wrote:
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
> >>>>>>>>258. From what I've gathered here I should get a new cork gasket and
> >>>>>>>>sandwich it between layers of RTV. Couple of questions: What should I
> >>>>>>>>use to clean the surfaces that will get the RTV? Is there any brand
> >>>>>>>>or type of RTV that is best for this or is it all the same?
> >>>>>>>>
> >>>>>>>
son. The 'original' bunjy jumper. He spent many an afternoon tied up
to the tree in the driveway right at fender level so he could see and
even touch. He seemed to enjoy it. He loved playing with greasy
stuff... LOL!
But hey at 10 or 12 he was helping me swap head gaskets and now knows
how to do a 'glass body build on a CJ7....
Mike
Jim85CJ wrote:
>
> "I described in another post to you how to check your canister purge"
> I have that printed out and will check next time I can get greasy (2
> kids, one only 18 months old... Mom runs around with the older one and I
> get to watch the baby... not good to be real greasy all the time. Makes
> car repairs tough (basically I get to work on the Jeep during naps)).
>
> Mike Romain wrote:
> > Well, yes and no, mostly no.
> >
> > The PCV or CCV systems are balanced.
> >
> > Basically that means that the flow rate on the PCV suction should match
> > the intake from the air filter and a little extra to suck fumes.
> >
> > If the cover or the grommets are leaking or if the breather hole
> > suddenly gets 1/3 bigger when you pull the fitting out or the charcoal
> > canister purge line hooked to the PCV line purges at idle, the PCV or
> > CCV gets overpowered and can't suck enough to do it's job.
> >
> > This leads to oil blowing into the air filter. I just noticed I have to
> > do the CCV plastic line again on our Cherokee. There is oil dripping
> > out the bottom of the air filter box again. I did mine a couple years
> > ago and the CCV is just a tiny hose that plugs easy.
> >
> > I described in another post to you how to check your canister purge.
> >
> > Mike
> >
> > Jim85CJ wrote:
> >
> >>That makes sense...
> >>I'm afraid to ask this question... When I have the PCV breather out, it
> >>looks like smoke or steam coming out of the hole. I know the PCV valve
> >>works (when I take it out of the valve cover and put my thumb over it
> >>there is a strong suction). Should anything come out the PCV breather hole?
> >>
> >>Mike Romain wrote:
> >>
> >>
> >>>Think on where the oil is coming from inside the engine. It comes out
> >>>the top of the rockers via a hollow push rod. The rockers then fling
> >>>the oil up at the valve cover.
> >>>
> >>>The baffle on the stock one picks up air down near the head, the Al one
> >>>picks up the splash at the top.
> >>>
> >>>Mike
> >>>
> >>>Jim85CJ wrote:
> >>>
> >>>
> >>>>really? It looks like the original has a direct route for the oil to
> >>>>take. The aluminum one seems to block the oil more. I guess the first
> >>>>thing I need to do is figure out why I get oil in the air filter :-).
> >>>>
> >>>>Mike Romain wrote:
> >>>>
> >>>>
> >>>>
> >>>>>I would think the original is better. That looks like a design
> >>>>>compromise on the aluminum cover.
> >>>>>
> >>>>>The aftermarket one I bought matched my stock one exactly except for the
> >>>>>color, this one is black, the stock one was AMC green.
> >>>>>
> >>>>>Mike
> >>>>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>>>>88 Cherokee 235 BFG AT's
> >>>>>
> >>>>>Jim85CJ wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>>>Here are the pics I wanted to see...
> >>>>>>here's the one I have:
> >>>>>>http://www.sierrajeep.com/images/Val...k%20baffle.jpg
> >>>>>>This one looks like it would work better:
> >>>>>>http://www.sierrajeep.com/images/Val...%20baffles.jpg
> >>>>>>
> >>>>>>http://www.sierrajeep.com/aluminum.htm
> >>>>>>
> >>>>>>Jim85CJ wrote:
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>>Does anyone have a pic of the underside of their valve cover? The one I
> >>>>>>>removed is not original so I'm wondering if there is any difference.
> >>>>>>>
> >>>>>>>Jim85CJ wrote:
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>>I'm finally going to attempt to fix my leaky valve cover on my 85 CJ7
> >>>>>>>>258. From what I've gathered here I should get a new cork gasket and
> >>>>>>>>sandwich it between layers of RTV. Couple of questions: What should I
> >>>>>>>>use to clean the surfaces that will get the RTV? Is there any brand
> >>>>>>>>or type of RTV that is best for this or is it all the same?
> >>>>>>>>
> >>>>>>>