94XJ Blow-by
04-12-2004, 10:29 PM
#21
Guest
Posts: n/a
Re: 94XJ Blow-by
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:407AC155.882B96E3@sympatico.ca...
> Most XJ's don't have a PCV valve. What engine do you have in there?
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Adonis wrote:
> >
> > I took my 94XJ to a local Jeep hobbyist install/repair shop with some
> > blow-by in which I have, he explained that I need to flush my engine,
but
> > googling around suggests that it may be my PCV valve (which is broken,
> > physically) but also when the guy stuck his finger into the filler cap
there
> > was a very good amount of sludge, he wants to charge 40$ for an oil
change
> > to flush out the contaminants this week and to return next week to flush
it
> > again for another 40$, as well as he will replace the PCV, should this
be a
> > go? or should I go somewhere else?
> >
> > Any suggestions are greatly appreciated.
> >
> > Adonis
I have an L6
news:407AC155.882B96E3@sympatico.ca...
> Most XJ's don't have a PCV valve. What engine do you have in there?
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Adonis wrote:
> >
> > I took my 94XJ to a local Jeep hobbyist install/repair shop with some
> > blow-by in which I have, he explained that I need to flush my engine,
but
> > googling around suggests that it may be my PCV valve (which is broken,
> > physically) but also when the guy stuck his finger into the filler cap
there
> > was a very good amount of sludge, he wants to charge 40$ for an oil
change
> > to flush out the contaminants this week and to return next week to flush
it
> > again for another 40$, as well as he will replace the PCV, should this
be a
> > go? or should I go somewhere else?
> >
> > Any suggestions are greatly appreciated.
> >
> > Adonis
I have an L6
04-13-2004, 07:47 PM
#26
Guest
Posts: n/a
Re: 94XJ Blow-by
make sure he installs the the revised vacuum supply harness for the system and
not just the valve
Adonis wrote:
> I took my 94XJ to a local Jeep hobbyist install/repair shop with some
> blow-by in which I have, he explained that I need to flush my engine, but
> googling around suggests that it may be my PCV valve (which is broken,
> physically) but also when the guy stuck his finger into the filler cap there
> was a very good amount of sludge, he wants to charge 40$ for an oil change
> to flush out the contaminants this week and to return next week to flush it
> again for another 40$, as well as he will replace the PCV, should this be a
> go? or should I go somewhere else?
>
> Any suggestions are greatly appreciated.
>
> Adonis
not just the valve
Adonis wrote:
> I took my 94XJ to a local Jeep hobbyist install/repair shop with some
> blow-by in which I have, he explained that I need to flush my engine, but
> googling around suggests that it may be my PCV valve (which is broken,
> physically) but also when the guy stuck his finger into the filler cap there
> was a very good amount of sludge, he wants to charge 40$ for an oil change
> to flush out the contaminants this week and to return next week to flush it
> again for another 40$, as well as he will replace the PCV, should this be a
> go? or should I go somewhere else?
>
> Any suggestions are greatly appreciated.
>
> Adonis
04-13-2004, 07:47 PM
#27
Guest
Posts: n/a
Re: 94XJ Blow-by
make sure he installs the the revised vacuum supply harness for the system and
not just the valve
Adonis wrote:
> I took my 94XJ to a local Jeep hobbyist install/repair shop with some
> blow-by in which I have, he explained that I need to flush my engine, but
> googling around suggests that it may be my PCV valve (which is broken,
> physically) but also when the guy stuck his finger into the filler cap there
> was a very good amount of sludge, he wants to charge 40$ for an oil change
> to flush out the contaminants this week and to return next week to flush it
> again for another 40$, as well as he will replace the PCV, should this be a
> go? or should I go somewhere else?
>
> Any suggestions are greatly appreciated.
>
> Adonis
not just the valve
Adonis wrote:
> I took my 94XJ to a local Jeep hobbyist install/repair shop with some
> blow-by in which I have, he explained that I need to flush my engine, but
> googling around suggests that it may be my PCV valve (which is broken,
> physically) but also when the guy stuck his finger into the filler cap there
> was a very good amount of sludge, he wants to charge 40$ for an oil change
> to flush out the contaminants this week and to return next week to flush it
> again for another 40$, as well as he will replace the PCV, should this be a
> go? or should I go somewhere else?
>
> Any suggestions are greatly appreciated.
>
> Adonis
04-13-2004, 07:47 PM
#28
Guest
Posts: n/a
Re: 94XJ Blow-by
make sure he installs the the revised vacuum supply harness for the system and
not just the valve
Adonis wrote:
> I took my 94XJ to a local Jeep hobbyist install/repair shop with some
> blow-by in which I have, he explained that I need to flush my engine, but
> googling around suggests that it may be my PCV valve (which is broken,
> physically) but also when the guy stuck his finger into the filler cap there
> was a very good amount of sludge, he wants to charge 40$ for an oil change
> to flush out the contaminants this week and to return next week to flush it
> again for another 40$, as well as he will replace the PCV, should this be a
> go? or should I go somewhere else?
>
> Any suggestions are greatly appreciated.
>
> Adonis
not just the valve
Adonis wrote:
> I took my 94XJ to a local Jeep hobbyist install/repair shop with some
> blow-by in which I have, he explained that I need to flush my engine, but
> googling around suggests that it may be my PCV valve (which is broken,
> physically) but also when the guy stuck his finger into the filler cap there
> was a very good amount of sludge, he wants to charge 40$ for an oil change
> to flush out the contaminants this week and to return next week to flush it
> again for another 40$, as well as he will replace the PCV, should this be a
> go? or should I go somewhere else?
>
> Any suggestions are greatly appreciated.
>
> Adonis
04-13-2004, 07:47 PM
#29
Guest
Posts: n/a
Re: 94XJ Blow-by
make sure he installs the the revised vacuum supply harness for the system and
not just the valve
Adonis wrote:
> I took my 94XJ to a local Jeep hobbyist install/repair shop with some
> blow-by in which I have, he explained that I need to flush my engine, but
> googling around suggests that it may be my PCV valve (which is broken,
> physically) but also when the guy stuck his finger into the filler cap there
> was a very good amount of sludge, he wants to charge 40$ for an oil change
> to flush out the contaminants this week and to return next week to flush it
> again for another 40$, as well as he will replace the PCV, should this be a
> go? or should I go somewhere else?
>
> Any suggestions are greatly appreciated.
>
> Adonis
not just the valve
Adonis wrote:
> I took my 94XJ to a local Jeep hobbyist install/repair shop with some
> blow-by in which I have, he explained that I need to flush my engine, but
> googling around suggests that it may be my PCV valve (which is broken,
> physically) but also when the guy stuck his finger into the filler cap there
> was a very good amount of sludge, he wants to charge 40$ for an oil change
> to flush out the contaminants this week and to return next week to flush it
> again for another 40$, as well as he will replace the PCV, should this be a
> go? or should I go somewhere else?
>
> Any suggestions are greatly appreciated.
>
> Adonis
04-15-2004, 11:40 AM
#30
Guest
Posts: n/a
Re: 94XJ Blow-by
The link below helped me as well, I just gor my ZJ and it took all of 5
minutes to change the CCV, I was told by a mechanic that I needed a new rear
main seal, and quoted 6 to 10 hours to fix.
As we were changing the CCV I realised it was probably a simple clean up
with carb cleaner and a wire as well. But at less than $10 CDN, I put the
new one in. You should use a Forked Pry bar and make sure the prongs are
long enough to fit around, you may break the plastic lip.
Paul
1995 ZJ 4.0 Limited.
BTW I changed the Valve cover Gasket as it was leaking too from the back.
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:407B0B26.B2BAC641@sympatico.ca...
> The rear plastic tube is plugged up. A good soak in carb cleaner and a
> ream with a chunk of insulated wire fixed mine. 12 gauge automotive wire
> I think it was.
>
> The CCV grommet in the rear has a metered hole that can be cleaned out
> with a paper clip. If it has been blocked for a long time, sludge will
> have built up and the grommet might need to be taken out to clean under
> it or even the cover removed to really clean it out.
>
> The CCV is calibrated to use the air intake hose from the filter. If
> the grommets are leaking, too much air can get in and the CCV will not
> suck hard enough so again oil spits into the air filter.
>
> Same for a worn out oil filler cap.
>
> But if the back tube is plugged, it just spits oil out everywhere, fix
> that first and see if the leaks continue, if they do seal more up.
>
> Here is a link on it with some part numbers for new:
>
> http://www.off-road.com/jeep/cheroke...ltr/blowby.htm
>
> Mike
>
>
> Lee Ayrton wrote:
> >
> > Ah, thanks, you just opened the can of worms that I was looking at. My
> > `89 Cherokee 4.0 is blowing a respectable amount of oil into the filter
> > box, as well as around both valve cover grommets and the filler cap.
> > There's a small diameter hard tube that exits the rear third of the
valve
> > cover and enters the intake manifold. There's a large-bore hard tube
that
> > exits the front third of the valve cover and enters the rear of the
filter
> > box. Clearly something isn't venting correctly, but where should I
look?
> >
> > On Mon, 12 Apr 2004, Mike Romain wrote:
> >
> > > So I guess no matter what engine you have it does need a couple
> > > flushes. You should put an additive in, drive it a bit then change
the
> > > oil. Several times.
> > >
> > > I am concerned a bit with the PCV thing. If the mechanic doesn't know
> > > the difference between a PCV and CCV, well... Run fast...
> > >
> > > Jeep engines are really touchy about the PCV and CCV systems working
> > > right or they can blow massive amounts of oil into the air filters.
> > > Enough I know a few folks that got suckered into new engines only to
> > > have the same oil blow that only needed a $5.00 fix...
> > >
> > > Mike
> > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > > 88 Cherokee 235 BFG AT's
> > >
> > > Adonis wrote:
> > > >
> > > > I took my 94XJ to a local Jeep hobbyist install/repair shop with
some
> > > > blow-by in which I have, he explained that I need to flush my
engine, but
> > > > googling around suggests that it may be my PCV valve (which is
broken,
> > > > physically) but also when the guy stuck his finger into the filler
cap there
> > > > was a very good amount of sludge, he wants to charge 40$ for an oil
change
> > > > to flush out the contaminants this week and to return next week to
flush it
> > > > again for another 40$, as well as he will replace the PCV, should
this be a
> > > > go? or should I go somewhere else?
> > > >
> > > > Any suggestions are greatly appreciated.
> > > >
> > > > Adonis
> > >
minutes to change the CCV, I was told by a mechanic that I needed a new rear
main seal, and quoted 6 to 10 hours to fix.
As we were changing the CCV I realised it was probably a simple clean up
with carb cleaner and a wire as well. But at less than $10 CDN, I put the
new one in. You should use a Forked Pry bar and make sure the prongs are
long enough to fit around, you may break the plastic lip.
Paul
1995 ZJ 4.0 Limited.
BTW I changed the Valve cover Gasket as it was leaking too from the back.
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:407B0B26.B2BAC641@sympatico.ca...
> The rear plastic tube is plugged up. A good soak in carb cleaner and a
> ream with a chunk of insulated wire fixed mine. 12 gauge automotive wire
> I think it was.
>
> The CCV grommet in the rear has a metered hole that can be cleaned out
> with a paper clip. If it has been blocked for a long time, sludge will
> have built up and the grommet might need to be taken out to clean under
> it or even the cover removed to really clean it out.
>
> The CCV is calibrated to use the air intake hose from the filter. If
> the grommets are leaking, too much air can get in and the CCV will not
> suck hard enough so again oil spits into the air filter.
>
> Same for a worn out oil filler cap.
>
> But if the back tube is plugged, it just spits oil out everywhere, fix
> that first and see if the leaks continue, if they do seal more up.
>
> Here is a link on it with some part numbers for new:
>
> http://www.off-road.com/jeep/cheroke...ltr/blowby.htm
>
> Mike
>
>
> Lee Ayrton wrote:
> >
> > Ah, thanks, you just opened the can of worms that I was looking at. My
> > `89 Cherokee 4.0 is blowing a respectable amount of oil into the filter
> > box, as well as around both valve cover grommets and the filler cap.
> > There's a small diameter hard tube that exits the rear third of the
valve
> > cover and enters the intake manifold. There's a large-bore hard tube
that
> > exits the front third of the valve cover and enters the rear of the
filter
> > box. Clearly something isn't venting correctly, but where should I
look?
> >
> > On Mon, 12 Apr 2004, Mike Romain wrote:
> >
> > > So I guess no matter what engine you have it does need a couple
> > > flushes. You should put an additive in, drive it a bit then change
the
> > > oil. Several times.
> > >
> > > I am concerned a bit with the PCV thing. If the mechanic doesn't know
> > > the difference between a PCV and CCV, well... Run fast...
> > >
> > > Jeep engines are really touchy about the PCV and CCV systems working
> > > right or they can blow massive amounts of oil into the air filters.
> > > Enough I know a few folks that got suckered into new engines only to
> > > have the same oil blow that only needed a $5.00 fix...
> > >
> > > Mike
> > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > > 88 Cherokee 235 BFG AT's
> > >
> > > Adonis wrote:
> > > >
> > > > I took my 94XJ to a local Jeep hobbyist install/repair shop with
some
> > > > blow-by in which I have, he explained that I need to flush my
engine, but
> > > > googling around suggests that it may be my PCV valve (which is
broken,
> > > > physically) but also when the guy stuck his finger into the filler
cap there
> > > > was a very good amount of sludge, he wants to charge 40$ for an oil
change
> > > > to flush out the contaminants this week and to return next week to
flush it
> > > > again for another 40$, as well as he will replace the PCV, should
this be a
> > > > go? or should I go somewhere else?
> > > >
> > > > Any suggestions are greatly appreciated.
> > > >
> > > > Adonis
> > >
