6 cy engine problem
05-20-2005, 07:11 PM
#31
Guest
Posts: n/a
Re: 6 cy engine problem
I discounted the possibility of the rounded cam shaft because I like to
think the problem will always be the cheapest thing to fix. In this case,
even if the cheapest thing isn't the broken part du jour, it rests right on
top of it. If the cam is rounded off, odds are good that the lifter will be
seriously worn too.
"MikeG" <justme@idontknow.com> wrote in message
news:bOrje.55821$IO.43814@tornado.tampabay.rr.com. ..
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got
> tight. I was able to look down the small push rod hole and observe the
> lifter. It was not doing a thing. I changed the rocker and push rod just
> incase one was bent etc. that I could not detect with my eye. The push
> rods were of equal length, and straight when rolled across the floor. The
> major concern now is that: if by chance the oil passage to that lifter or
> all lifters for that matter are clogged with crud of unknown substance, I
> don't feel safe unless I somhow clean them all out. Perhaps not ideal
> with the engine installed, and 2nd...what has happened to all the metal
> that was ground off of the cam? I know most of it is suspended in the
> oil, the filter probably has taken out some, but I am sure it circulated
> throught all the bearings. Last oil change was about 1000 miles ago, and I
> am guessing that this grind down has taken several thousand miles. Never
> noticed anything unusual in the oil. So.....my strategy will be to first
> pull the head, then the lifter and look at the cam. Priced a cam
> yesterday = $200.00 Yipes. Stay tuned!!!! TX Mike
>
>
>
> "Jeff Strickland" <spamcatcher@yahoo.net> wrote in message
> news:8tudnYedjsiUgxPfRVn-2w@ez2.net...
>> Collapsed lifter would be my first guess. As I went to look for the
>> lifter
>> hiding in the bottom of a very deep hole, I might find the real problem,
>> but
>> I think the lifter is where you need to start. I am not sure why you
>> would
>> swap a rocker or the push rod, but checking for a bent push rod makes
>> sense.
>> If the pushrod was straight, I would have kept looking for the lifter,
>> and
>> not bother swapping the rod and rocker.
>>
>>
>>
>>
>> "MikeG" <justme@idontknow.com> wrote in message
>> news:pE8je.30320$VH2.14614@tornado.tampabay.rr.com ...
>>> 84 CJ7 4.2L rebuilt engine installed 27K miles ago. Last week, noticed
>>> popping out of carb. Found out that the # 1 cylinder exhaust valve and
>>> rocker/pushrod were not moving. Exchanged intake pushrod and rocker
>> with
>>> the exhaust, same problem. Nuts and bridge are tight. Any opinions on
>>> problem......collapsed lifter, round camshaft lobe or other???? TIA
>> Mike
>>>
>>>
>>
>>
>
>
think the problem will always be the cheapest thing to fix. In this case,
even if the cheapest thing isn't the broken part du jour, it rests right on
top of it. If the cam is rounded off, odds are good that the lifter will be
seriously worn too.
"MikeG" <justme@idontknow.com> wrote in message
news:bOrje.55821$IO.43814@tornado.tampabay.rr.com. ..
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got
> tight. I was able to look down the small push rod hole and observe the
> lifter. It was not doing a thing. I changed the rocker and push rod just
> incase one was bent etc. that I could not detect with my eye. The push
> rods were of equal length, and straight when rolled across the floor. The
> major concern now is that: if by chance the oil passage to that lifter or
> all lifters for that matter are clogged with crud of unknown substance, I
> don't feel safe unless I somhow clean them all out. Perhaps not ideal
> with the engine installed, and 2nd...what has happened to all the metal
> that was ground off of the cam? I know most of it is suspended in the
> oil, the filter probably has taken out some, but I am sure it circulated
> throught all the bearings. Last oil change was about 1000 miles ago, and I
> am guessing that this grind down has taken several thousand miles. Never
> noticed anything unusual in the oil. So.....my strategy will be to first
> pull the head, then the lifter and look at the cam. Priced a cam
> yesterday = $200.00 Yipes. Stay tuned!!!! TX Mike
>
>
>
> "Jeff Strickland" <spamcatcher@yahoo.net> wrote in message
> news:8tudnYedjsiUgxPfRVn-2w@ez2.net...
>> Collapsed lifter would be my first guess. As I went to look for the
>> lifter
>> hiding in the bottom of a very deep hole, I might find the real problem,
>> but
>> I think the lifter is where you need to start. I am not sure why you
>> would
>> swap a rocker or the push rod, but checking for a bent push rod makes
>> sense.
>> If the pushrod was straight, I would have kept looking for the lifter,
>> and
>> not bother swapping the rod and rocker.
>>
>>
>>
>>
>> "MikeG" <justme@idontknow.com> wrote in message
>> news:pE8je.30320$VH2.14614@tornado.tampabay.rr.com ...
>>> 84 CJ7 4.2L rebuilt engine installed 27K miles ago. Last week, noticed
>>> popping out of carb. Found out that the # 1 cylinder exhaust valve and
>>> rocker/pushrod were not moving. Exchanged intake pushrod and rocker
>> with
>>> the exhaust, same problem. Nuts and bridge are tight. Any opinions on
>>> problem......collapsed lifter, round camshaft lobe or other???? TIA
>> Mike
>>>
>>>
>>
>>
>
>
05-20-2005, 07:11 PM
#32
Guest
Posts: n/a
Re: 6 cy engine problem
I discounted the possibility of the rounded cam shaft because I like to
think the problem will always be the cheapest thing to fix. In this case,
even if the cheapest thing isn't the broken part du jour, it rests right on
top of it. If the cam is rounded off, odds are good that the lifter will be
seriously worn too.
"MikeG" <justme@idontknow.com> wrote in message
news:bOrje.55821$IO.43814@tornado.tampabay.rr.com. ..
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got
> tight. I was able to look down the small push rod hole and observe the
> lifter. It was not doing a thing. I changed the rocker and push rod just
> incase one was bent etc. that I could not detect with my eye. The push
> rods were of equal length, and straight when rolled across the floor. The
> major concern now is that: if by chance the oil passage to that lifter or
> all lifters for that matter are clogged with crud of unknown substance, I
> don't feel safe unless I somhow clean them all out. Perhaps not ideal
> with the engine installed, and 2nd...what has happened to all the metal
> that was ground off of the cam? I know most of it is suspended in the
> oil, the filter probably has taken out some, but I am sure it circulated
> throught all the bearings. Last oil change was about 1000 miles ago, and I
> am guessing that this grind down has taken several thousand miles. Never
> noticed anything unusual in the oil. So.....my strategy will be to first
> pull the head, then the lifter and look at the cam. Priced a cam
> yesterday = $200.00 Yipes. Stay tuned!!!! TX Mike
>
>
>
> "Jeff Strickland" <spamcatcher@yahoo.net> wrote in message
> news:8tudnYedjsiUgxPfRVn-2w@ez2.net...
>> Collapsed lifter would be my first guess. As I went to look for the
>> lifter
>> hiding in the bottom of a very deep hole, I might find the real problem,
>> but
>> I think the lifter is where you need to start. I am not sure why you
>> would
>> swap a rocker or the push rod, but checking for a bent push rod makes
>> sense.
>> If the pushrod was straight, I would have kept looking for the lifter,
>> and
>> not bother swapping the rod and rocker.
>>
>>
>>
>>
>> "MikeG" <justme@idontknow.com> wrote in message
>> news:pE8je.30320$VH2.14614@tornado.tampabay.rr.com ...
>>> 84 CJ7 4.2L rebuilt engine installed 27K miles ago. Last week, noticed
>>> popping out of carb. Found out that the # 1 cylinder exhaust valve and
>>> rocker/pushrod were not moving. Exchanged intake pushrod and rocker
>> with
>>> the exhaust, same problem. Nuts and bridge are tight. Any opinions on
>>> problem......collapsed lifter, round camshaft lobe or other???? TIA
>> Mike
>>>
>>>
>>
>>
>
>
think the problem will always be the cheapest thing to fix. In this case,
even if the cheapest thing isn't the broken part du jour, it rests right on
top of it. If the cam is rounded off, odds are good that the lifter will be
seriously worn too.
"MikeG" <justme@idontknow.com> wrote in message
news:bOrje.55821$IO.43814@tornado.tampabay.rr.com. ..
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got
> tight. I was able to look down the small push rod hole and observe the
> lifter. It was not doing a thing. I changed the rocker and push rod just
> incase one was bent etc. that I could not detect with my eye. The push
> rods were of equal length, and straight when rolled across the floor. The
> major concern now is that: if by chance the oil passage to that lifter or
> all lifters for that matter are clogged with crud of unknown substance, I
> don't feel safe unless I somhow clean them all out. Perhaps not ideal
> with the engine installed, and 2nd...what has happened to all the metal
> that was ground off of the cam? I know most of it is suspended in the
> oil, the filter probably has taken out some, but I am sure it circulated
> throught all the bearings. Last oil change was about 1000 miles ago, and I
> am guessing that this grind down has taken several thousand miles. Never
> noticed anything unusual in the oil. So.....my strategy will be to first
> pull the head, then the lifter and look at the cam. Priced a cam
> yesterday = $200.00 Yipes. Stay tuned!!!! TX Mike
>
>
>
> "Jeff Strickland" <spamcatcher@yahoo.net> wrote in message
> news:8tudnYedjsiUgxPfRVn-2w@ez2.net...
>> Collapsed lifter would be my first guess. As I went to look for the
>> lifter
>> hiding in the bottom of a very deep hole, I might find the real problem,
>> but
>> I think the lifter is where you need to start. I am not sure why you
>> would
>> swap a rocker or the push rod, but checking for a bent push rod makes
>> sense.
>> If the pushrod was straight, I would have kept looking for the lifter,
>> and
>> not bother swapping the rod and rocker.
>>
>>
>>
>>
>> "MikeG" <justme@idontknow.com> wrote in message
>> news:pE8je.30320$VH2.14614@tornado.tampabay.rr.com ...
>>> 84 CJ7 4.2L rebuilt engine installed 27K miles ago. Last week, noticed
>>> popping out of carb. Found out that the # 1 cylinder exhaust valve and
>>> rocker/pushrod were not moving. Exchanged intake pushrod and rocker
>> with
>>> the exhaust, same problem. Nuts and bridge are tight. Any opinions on
>>> problem......collapsed lifter, round camshaft lobe or other???? TIA
>> Mike
>>>
>>>
>>
>>
>
>
05-20-2005, 07:11 PM
#33
Guest
Posts: n/a
Re: 6 cy engine problem
I discounted the possibility of the rounded cam shaft because I like to
think the problem will always be the cheapest thing to fix. In this case,
even if the cheapest thing isn't the broken part du jour, it rests right on
top of it. If the cam is rounded off, odds are good that the lifter will be
seriously worn too.
"MikeG" <justme@idontknow.com> wrote in message
news:bOrje.55821$IO.43814@tornado.tampabay.rr.com. ..
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got
> tight. I was able to look down the small push rod hole and observe the
> lifter. It was not doing a thing. I changed the rocker and push rod just
> incase one was bent etc. that I could not detect with my eye. The push
> rods were of equal length, and straight when rolled across the floor. The
> major concern now is that: if by chance the oil passage to that lifter or
> all lifters for that matter are clogged with crud of unknown substance, I
> don't feel safe unless I somhow clean them all out. Perhaps not ideal
> with the engine installed, and 2nd...what has happened to all the metal
> that was ground off of the cam? I know most of it is suspended in the
> oil, the filter probably has taken out some, but I am sure it circulated
> throught all the bearings. Last oil change was about 1000 miles ago, and I
> am guessing that this grind down has taken several thousand miles. Never
> noticed anything unusual in the oil. So.....my strategy will be to first
> pull the head, then the lifter and look at the cam. Priced a cam
> yesterday = $200.00 Yipes. Stay tuned!!!! TX Mike
>
>
>
> "Jeff Strickland" <spamcatcher@yahoo.net> wrote in message
> news:8tudnYedjsiUgxPfRVn-2w@ez2.net...
>> Collapsed lifter would be my first guess. As I went to look for the
>> lifter
>> hiding in the bottom of a very deep hole, I might find the real problem,
>> but
>> I think the lifter is where you need to start. I am not sure why you
>> would
>> swap a rocker or the push rod, but checking for a bent push rod makes
>> sense.
>> If the pushrod was straight, I would have kept looking for the lifter,
>> and
>> not bother swapping the rod and rocker.
>>
>>
>>
>>
>> "MikeG" <justme@idontknow.com> wrote in message
>> news:pE8je.30320$VH2.14614@tornado.tampabay.rr.com ...
>>> 84 CJ7 4.2L rebuilt engine installed 27K miles ago. Last week, noticed
>>> popping out of carb. Found out that the # 1 cylinder exhaust valve and
>>> rocker/pushrod were not moving. Exchanged intake pushrod and rocker
>> with
>>> the exhaust, same problem. Nuts and bridge are tight. Any opinions on
>>> problem......collapsed lifter, round camshaft lobe or other???? TIA
>> Mike
>>>
>>>
>>
>>
>
>
think the problem will always be the cheapest thing to fix. In this case,
even if the cheapest thing isn't the broken part du jour, it rests right on
top of it. If the cam is rounded off, odds are good that the lifter will be
seriously worn too.
"MikeG" <justme@idontknow.com> wrote in message
news:bOrje.55821$IO.43814@tornado.tampabay.rr.com. ..
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got
> tight. I was able to look down the small push rod hole and observe the
> lifter. It was not doing a thing. I changed the rocker and push rod just
> incase one was bent etc. that I could not detect with my eye. The push
> rods were of equal length, and straight when rolled across the floor. The
> major concern now is that: if by chance the oil passage to that lifter or
> all lifters for that matter are clogged with crud of unknown substance, I
> don't feel safe unless I somhow clean them all out. Perhaps not ideal
> with the engine installed, and 2nd...what has happened to all the metal
> that was ground off of the cam? I know most of it is suspended in the
> oil, the filter probably has taken out some, but I am sure it circulated
> throught all the bearings. Last oil change was about 1000 miles ago, and I
> am guessing that this grind down has taken several thousand miles. Never
> noticed anything unusual in the oil. So.....my strategy will be to first
> pull the head, then the lifter and look at the cam. Priced a cam
> yesterday = $200.00 Yipes. Stay tuned!!!! TX Mike
>
>
>
> "Jeff Strickland" <spamcatcher@yahoo.net> wrote in message
> news:8tudnYedjsiUgxPfRVn-2w@ez2.net...
>> Collapsed lifter would be my first guess. As I went to look for the
>> lifter
>> hiding in the bottom of a very deep hole, I might find the real problem,
>> but
>> I think the lifter is where you need to start. I am not sure why you
>> would
>> swap a rocker or the push rod, but checking for a bent push rod makes
>> sense.
>> If the pushrod was straight, I would have kept looking for the lifter,
>> and
>> not bother swapping the rod and rocker.
>>
>>
>>
>>
>> "MikeG" <justme@idontknow.com> wrote in message
>> news:pE8je.30320$VH2.14614@tornado.tampabay.rr.com ...
>>> 84 CJ7 4.2L rebuilt engine installed 27K miles ago. Last week, noticed
>>> popping out of carb. Found out that the # 1 cylinder exhaust valve and
>>> rocker/pushrod were not moving. Exchanged intake pushrod and rocker
>> with
>>> the exhaust, same problem. Nuts and bridge are tight. Any opinions on
>>> problem......collapsed lifter, round camshaft lobe or other???? TIA
>> Mike
>>>
>>>
>>
>>
>
>
05-20-2005, 09:33 PM
#34
Guest
Posts: n/a
Re: 6 cy engine problem
Hi Mike,
I would guess the oil filter caught the worst of the metal
fillings, unless you revved it tight enough to bypass the filter. It's
always new cam, new lifters, I'm not sure you were saying that. Then go
back to changing oil and filter every five hundred miles, like you were
doing with your new engine break-in, for a couple of times will clean
the pan without disassembly. Maybe buy a magnetic drain plug.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
MikeG wrote:
>
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got tight.
> I was able to look down the small push rod hole and observe the lifter. It
> was not doing a thing. I changed the rocker and push rod just incase one
> was bent etc. that I could not detect with my eye. The push rods were of
> equal length, and straight when rolled across the floor. The major concern
> now is that: if by chance the oil passage to that lifter or all lifters for
> that matter are clogged with crud of unknown substance, I don't feel safe
> unless I somhow clean them all out. Perhaps not ideal with the engine
> installed, and 2nd...what has happened to all the metal that was ground off
> of the cam? I know most of it is suspended in the oil, the filter probably
> has taken out some, but I am sure it circulated throught all the bearings.
> Last oil change was about 1000 miles ago, and I am guessing that this grind
> down has taken several thousand miles. Never noticed anything unusual in
> the oil. So.....my strategy will be to first pull the head, then the lifter
> and look at the cam. Priced a cam yesterday = $200.00 Yipes. Stay
> tuned!!!! TX Mike
>
> "Jeff Strickland" <spamcatcher@yahoo.net> wrote in message
> news:8tudnYedjsiUgxPfRVn-2w@ez2.net...
> > Collapsed lifter would be my first guess. As I went to look for the lifter
> > hiding in the bottom of a very deep hole, I might find the real problem,
> > but
> > I think the lifter is where you need to start. I am not sure why you would
> > swap a rocker or the push rod, but checking for a bent push rod makes
> > sense.
> > If the pushrod was straight, I would have kept looking for the lifter, and
> > not bother swapping the rod and rocker.
> >
> >
> >
> >
> > "MikeG" <justme@idontknow.com> wrote in message
> > news:pE8je.30320$VH2.14614@tornado.tampabay.rr.com ...
> >> 84 CJ7 4.2L rebuilt engine installed 27K miles ago. Last week, noticed
> >> popping out of carb. Found out that the # 1 cylinder exhaust valve and
> >> rocker/pushrod were not moving. Exchanged intake pushrod and rocker
> > with
> >> the exhaust, same problem. Nuts and bridge are tight. Any opinions on
> >> problem......collapsed lifter, round camshaft lobe or other???? TIA
> > Mike
> >>
> >>
> >
> >
I would guess the oil filter caught the worst of the metal
fillings, unless you revved it tight enough to bypass the filter. It's
always new cam, new lifters, I'm not sure you were saying that. Then go
back to changing oil and filter every five hundred miles, like you were
doing with your new engine break-in, for a couple of times will clean
the pan without disassembly. Maybe buy a magnetic drain plug.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
MikeG wrote:
>
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got tight.
> I was able to look down the small push rod hole and observe the lifter. It
> was not doing a thing. I changed the rocker and push rod just incase one
> was bent etc. that I could not detect with my eye. The push rods were of
> equal length, and straight when rolled across the floor. The major concern
> now is that: if by chance the oil passage to that lifter or all lifters for
> that matter are clogged with crud of unknown substance, I don't feel safe
> unless I somhow clean them all out. Perhaps not ideal with the engine
> installed, and 2nd...what has happened to all the metal that was ground off
> of the cam? I know most of it is suspended in the oil, the filter probably
> has taken out some, but I am sure it circulated throught all the bearings.
> Last oil change was about 1000 miles ago, and I am guessing that this grind
> down has taken several thousand miles. Never noticed anything unusual in
> the oil. So.....my strategy will be to first pull the head, then the lifter
> and look at the cam. Priced a cam yesterday = $200.00 Yipes. Stay
> tuned!!!! TX Mike
>
> "Jeff Strickland" <spamcatcher@yahoo.net> wrote in message
> news:8tudnYedjsiUgxPfRVn-2w@ez2.net...
> > Collapsed lifter would be my first guess. As I went to look for the lifter
> > hiding in the bottom of a very deep hole, I might find the real problem,
> > but
> > I think the lifter is where you need to start. I am not sure why you would
> > swap a rocker or the push rod, but checking for a bent push rod makes
> > sense.
> > If the pushrod was straight, I would have kept looking for the lifter, and
> > not bother swapping the rod and rocker.
> >
> >
> >
> >
> > "MikeG" <justme@idontknow.com> wrote in message
> > news:pE8je.30320$VH2.14614@tornado.tampabay.rr.com ...
> >> 84 CJ7 4.2L rebuilt engine installed 27K miles ago. Last week, noticed
> >> popping out of carb. Found out that the # 1 cylinder exhaust valve and
> >> rocker/pushrod were not moving. Exchanged intake pushrod and rocker
> > with
> >> the exhaust, same problem. Nuts and bridge are tight. Any opinions on
> >> problem......collapsed lifter, round camshaft lobe or other???? TIA
> > Mike
> >>
> >>
> >
> >
05-20-2005, 09:33 PM
#35
Guest
Posts: n/a
Re: 6 cy engine problem
Hi Mike,
I would guess the oil filter caught the worst of the metal
fillings, unless you revved it tight enough to bypass the filter. It's
always new cam, new lifters, I'm not sure you were saying that. Then go
back to changing oil and filter every five hundred miles, like you were
doing with your new engine break-in, for a couple of times will clean
the pan without disassembly. Maybe buy a magnetic drain plug.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
MikeG wrote:
>
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got tight.
> I was able to look down the small push rod hole and observe the lifter. It
> was not doing a thing. I changed the rocker and push rod just incase one
> was bent etc. that I could not detect with my eye. The push rods were of
> equal length, and straight when rolled across the floor. The major concern
> now is that: if by chance the oil passage to that lifter or all lifters for
> that matter are clogged with crud of unknown substance, I don't feel safe
> unless I somhow clean them all out. Perhaps not ideal with the engine
> installed, and 2nd...what has happened to all the metal that was ground off
> of the cam? I know most of it is suspended in the oil, the filter probably
> has taken out some, but I am sure it circulated throught all the bearings.
> Last oil change was about 1000 miles ago, and I am guessing that this grind
> down has taken several thousand miles. Never noticed anything unusual in
> the oil. So.....my strategy will be to first pull the head, then the lifter
> and look at the cam. Priced a cam yesterday = $200.00 Yipes. Stay
> tuned!!!! TX Mike
>
> "Jeff Strickland" <spamcatcher@yahoo.net> wrote in message
> news:8tudnYedjsiUgxPfRVn-2w@ez2.net...
> > Collapsed lifter would be my first guess. As I went to look for the lifter
> > hiding in the bottom of a very deep hole, I might find the real problem,
> > but
> > I think the lifter is where you need to start. I am not sure why you would
> > swap a rocker or the push rod, but checking for a bent push rod makes
> > sense.
> > If the pushrod was straight, I would have kept looking for the lifter, and
> > not bother swapping the rod and rocker.
> >
> >
> >
> >
> > "MikeG" <justme@idontknow.com> wrote in message
> > news:pE8je.30320$VH2.14614@tornado.tampabay.rr.com ...
> >> 84 CJ7 4.2L rebuilt engine installed 27K miles ago. Last week, noticed
> >> popping out of carb. Found out that the # 1 cylinder exhaust valve and
> >> rocker/pushrod were not moving. Exchanged intake pushrod and rocker
> > with
> >> the exhaust, same problem. Nuts and bridge are tight. Any opinions on
> >> problem......collapsed lifter, round camshaft lobe or other???? TIA
> > Mike
> >>
> >>
> >
> >
I would guess the oil filter caught the worst of the metal
fillings, unless you revved it tight enough to bypass the filter. It's
always new cam, new lifters, I'm not sure you were saying that. Then go
back to changing oil and filter every five hundred miles, like you were
doing with your new engine break-in, for a couple of times will clean
the pan without disassembly. Maybe buy a magnetic drain plug.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
MikeG wrote:
>
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got tight.
> I was able to look down the small push rod hole and observe the lifter. It
> was not doing a thing. I changed the rocker and push rod just incase one
> was bent etc. that I could not detect with my eye. The push rods were of
> equal length, and straight when rolled across the floor. The major concern
> now is that: if by chance the oil passage to that lifter or all lifters for
> that matter are clogged with crud of unknown substance, I don't feel safe
> unless I somhow clean them all out. Perhaps not ideal with the engine
> installed, and 2nd...what has happened to all the metal that was ground off
> of the cam? I know most of it is suspended in the oil, the filter probably
> has taken out some, but I am sure it circulated throught all the bearings.
> Last oil change was about 1000 miles ago, and I am guessing that this grind
> down has taken several thousand miles. Never noticed anything unusual in
> the oil. So.....my strategy will be to first pull the head, then the lifter
> and look at the cam. Priced a cam yesterday = $200.00 Yipes. Stay
> tuned!!!! TX Mike
>
> "Jeff Strickland" <spamcatcher@yahoo.net> wrote in message
> news:8tudnYedjsiUgxPfRVn-2w@ez2.net...
> > Collapsed lifter would be my first guess. As I went to look for the lifter
> > hiding in the bottom of a very deep hole, I might find the real problem,
> > but
> > I think the lifter is where you need to start. I am not sure why you would
> > swap a rocker or the push rod, but checking for a bent push rod makes
> > sense.
> > If the pushrod was straight, I would have kept looking for the lifter, and
> > not bother swapping the rod and rocker.
> >
> >
> >
> >
> > "MikeG" <justme@idontknow.com> wrote in message
> > news:pE8je.30320$VH2.14614@tornado.tampabay.rr.com ...
> >> 84 CJ7 4.2L rebuilt engine installed 27K miles ago. Last week, noticed
> >> popping out of carb. Found out that the # 1 cylinder exhaust valve and
> >> rocker/pushrod were not moving. Exchanged intake pushrod and rocker
> > with
> >> the exhaust, same problem. Nuts and bridge are tight. Any opinions on
> >> problem......collapsed lifter, round camshaft lobe or other???? TIA
> > Mike
> >>
> >>
> >
> >
05-20-2005, 09:33 PM
#36
Guest
Posts: n/a
Re: 6 cy engine problem
Hi Mike,
I would guess the oil filter caught the worst of the metal
fillings, unless you revved it tight enough to bypass the filter. It's
always new cam, new lifters, I'm not sure you were saying that. Then go
back to changing oil and filter every five hundred miles, like you were
doing with your new engine break-in, for a couple of times will clean
the pan without disassembly. Maybe buy a magnetic drain plug.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
MikeG wrote:
>
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got tight.
> I was able to look down the small push rod hole and observe the lifter. It
> was not doing a thing. I changed the rocker and push rod just incase one
> was bent etc. that I could not detect with my eye. The push rods were of
> equal length, and straight when rolled across the floor. The major concern
> now is that: if by chance the oil passage to that lifter or all lifters for
> that matter are clogged with crud of unknown substance, I don't feel safe
> unless I somhow clean them all out. Perhaps not ideal with the engine
> installed, and 2nd...what has happened to all the metal that was ground off
> of the cam? I know most of it is suspended in the oil, the filter probably
> has taken out some, but I am sure it circulated throught all the bearings.
> Last oil change was about 1000 miles ago, and I am guessing that this grind
> down has taken several thousand miles. Never noticed anything unusual in
> the oil. So.....my strategy will be to first pull the head, then the lifter
> and look at the cam. Priced a cam yesterday = $200.00 Yipes. Stay
> tuned!!!! TX Mike
>
> "Jeff Strickland" <spamcatcher@yahoo.net> wrote in message
> news:8tudnYedjsiUgxPfRVn-2w@ez2.net...
> > Collapsed lifter would be my first guess. As I went to look for the lifter
> > hiding in the bottom of a very deep hole, I might find the real problem,
> > but
> > I think the lifter is where you need to start. I am not sure why you would
> > swap a rocker or the push rod, but checking for a bent push rod makes
> > sense.
> > If the pushrod was straight, I would have kept looking for the lifter, and
> > not bother swapping the rod and rocker.
> >
> >
> >
> >
> > "MikeG" <justme@idontknow.com> wrote in message
> > news:pE8je.30320$VH2.14614@tornado.tampabay.rr.com ...
> >> 84 CJ7 4.2L rebuilt engine installed 27K miles ago. Last week, noticed
> >> popping out of carb. Found out that the # 1 cylinder exhaust valve and
> >> rocker/pushrod were not moving. Exchanged intake pushrod and rocker
> > with
> >> the exhaust, same problem. Nuts and bridge are tight. Any opinions on
> >> problem......collapsed lifter, round camshaft lobe or other???? TIA
> > Mike
> >>
> >>
> >
> >
I would guess the oil filter caught the worst of the metal
fillings, unless you revved it tight enough to bypass the filter. It's
always new cam, new lifters, I'm not sure you were saying that. Then go
back to changing oil and filter every five hundred miles, like you were
doing with your new engine break-in, for a couple of times will clean
the pan without disassembly. Maybe buy a magnetic drain plug.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
MikeG wrote:
>
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got tight.
> I was able to look down the small push rod hole and observe the lifter. It
> was not doing a thing. I changed the rocker and push rod just incase one
> was bent etc. that I could not detect with my eye. The push rods were of
> equal length, and straight when rolled across the floor. The major concern
> now is that: if by chance the oil passage to that lifter or all lifters for
> that matter are clogged with crud of unknown substance, I don't feel safe
> unless I somhow clean them all out. Perhaps not ideal with the engine
> installed, and 2nd...what has happened to all the metal that was ground off
> of the cam? I know most of it is suspended in the oil, the filter probably
> has taken out some, but I am sure it circulated throught all the bearings.
> Last oil change was about 1000 miles ago, and I am guessing that this grind
> down has taken several thousand miles. Never noticed anything unusual in
> the oil. So.....my strategy will be to first pull the head, then the lifter
> and look at the cam. Priced a cam yesterday = $200.00 Yipes. Stay
> tuned!!!! TX Mike
>
> "Jeff Strickland" <spamcatcher@yahoo.net> wrote in message
> news:8tudnYedjsiUgxPfRVn-2w@ez2.net...
> > Collapsed lifter would be my first guess. As I went to look for the lifter
> > hiding in the bottom of a very deep hole, I might find the real problem,
> > but
> > I think the lifter is where you need to start. I am not sure why you would
> > swap a rocker or the push rod, but checking for a bent push rod makes
> > sense.
> > If the pushrod was straight, I would have kept looking for the lifter, and
> > not bother swapping the rod and rocker.
> >
> >
> >
> >
> > "MikeG" <justme@idontknow.com> wrote in message
> > news:pE8je.30320$VH2.14614@tornado.tampabay.rr.com ...
> >> 84 CJ7 4.2L rebuilt engine installed 27K miles ago. Last week, noticed
> >> popping out of carb. Found out that the # 1 cylinder exhaust valve and
> >> rocker/pushrod were not moving. Exchanged intake pushrod and rocker
> > with
> >> the exhaust, same problem. Nuts and bridge are tight. Any opinions on
> >> problem......collapsed lifter, round camshaft lobe or other???? TIA
> > Mike
> >>
> >>
> >
> >
05-20-2005, 09:33 PM
#37
Guest
Posts: n/a
Re: 6 cy engine problem
Hi Mike,
I would guess the oil filter caught the worst of the metal
fillings, unless you revved it tight enough to bypass the filter. It's
always new cam, new lifters, I'm not sure you were saying that. Then go
back to changing oil and filter every five hundred miles, like you were
doing with your new engine break-in, for a couple of times will clean
the pan without disassembly. Maybe buy a magnetic drain plug.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
MikeG wrote:
>
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got tight.
> I was able to look down the small push rod hole and observe the lifter. It
> was not doing a thing. I changed the rocker and push rod just incase one
> was bent etc. that I could not detect with my eye. The push rods were of
> equal length, and straight when rolled across the floor. The major concern
> now is that: if by chance the oil passage to that lifter or all lifters for
> that matter are clogged with crud of unknown substance, I don't feel safe
> unless I somhow clean them all out. Perhaps not ideal with the engine
> installed, and 2nd...what has happened to all the metal that was ground off
> of the cam? I know most of it is suspended in the oil, the filter probably
> has taken out some, but I am sure it circulated throught all the bearings.
> Last oil change was about 1000 miles ago, and I am guessing that this grind
> down has taken several thousand miles. Never noticed anything unusual in
> the oil. So.....my strategy will be to first pull the head, then the lifter
> and look at the cam. Priced a cam yesterday = $200.00 Yipes. Stay
> tuned!!!! TX Mike
>
> "Jeff Strickland" <spamcatcher@yahoo.net> wrote in message
> news:8tudnYedjsiUgxPfRVn-2w@ez2.net...
> > Collapsed lifter would be my first guess. As I went to look for the lifter
> > hiding in the bottom of a very deep hole, I might find the real problem,
> > but
> > I think the lifter is where you need to start. I am not sure why you would
> > swap a rocker or the push rod, but checking for a bent push rod makes
> > sense.
> > If the pushrod was straight, I would have kept looking for the lifter, and
> > not bother swapping the rod and rocker.
> >
> >
> >
> >
> > "MikeG" <justme@idontknow.com> wrote in message
> > news:pE8je.30320$VH2.14614@tornado.tampabay.rr.com ...
> >> 84 CJ7 4.2L rebuilt engine installed 27K miles ago. Last week, noticed
> >> popping out of carb. Found out that the # 1 cylinder exhaust valve and
> >> rocker/pushrod were not moving. Exchanged intake pushrod and rocker
> > with
> >> the exhaust, same problem. Nuts and bridge are tight. Any opinions on
> >> problem......collapsed lifter, round camshaft lobe or other???? TIA
> > Mike
> >>
> >>
> >
> >
I would guess the oil filter caught the worst of the metal
fillings, unless you revved it tight enough to bypass the filter. It's
always new cam, new lifters, I'm not sure you were saying that. Then go
back to changing oil and filter every five hundred miles, like you were
doing with your new engine break-in, for a couple of times will clean
the pan without disassembly. Maybe buy a magnetic drain plug.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
MikeG wrote:
>
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got tight.
> I was able to look down the small push rod hole and observe the lifter. It
> was not doing a thing. I changed the rocker and push rod just incase one
> was bent etc. that I could not detect with my eye. The push rods were of
> equal length, and straight when rolled across the floor. The major concern
> now is that: if by chance the oil passage to that lifter or all lifters for
> that matter are clogged with crud of unknown substance, I don't feel safe
> unless I somhow clean them all out. Perhaps not ideal with the engine
> installed, and 2nd...what has happened to all the metal that was ground off
> of the cam? I know most of it is suspended in the oil, the filter probably
> has taken out some, but I am sure it circulated throught all the bearings.
> Last oil change was about 1000 miles ago, and I am guessing that this grind
> down has taken several thousand miles. Never noticed anything unusual in
> the oil. So.....my strategy will be to first pull the head, then the lifter
> and look at the cam. Priced a cam yesterday = $200.00 Yipes. Stay
> tuned!!!! TX Mike
>
> "Jeff Strickland" <spamcatcher@yahoo.net> wrote in message
> news:8tudnYedjsiUgxPfRVn-2w@ez2.net...
> > Collapsed lifter would be my first guess. As I went to look for the lifter
> > hiding in the bottom of a very deep hole, I might find the real problem,
> > but
> > I think the lifter is where you need to start. I am not sure why you would
> > swap a rocker or the push rod, but checking for a bent push rod makes
> > sense.
> > If the pushrod was straight, I would have kept looking for the lifter, and
> > not bother swapping the rod and rocker.
> >
> >
> >
> >
> > "MikeG" <justme@idontknow.com> wrote in message
> > news:pE8je.30320$VH2.14614@tornado.tampabay.rr.com ...
> >> 84 CJ7 4.2L rebuilt engine installed 27K miles ago. Last week, noticed
> >> popping out of carb. Found out that the # 1 cylinder exhaust valve and
> >> rocker/pushrod were not moving. Exchanged intake pushrod and rocker
> > with
> >> the exhaust, same problem. Nuts and bridge are tight. Any opinions on
> >> problem......collapsed lifter, round camshaft lobe or other???? TIA
> > Mike
> >>
> >>
> >
> >
05-20-2005, 09:46 PM
#38
Guest
Posts: n/a
Re: 6 cy engine problem
http://www.cranecams.com/?show=article&id=2
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
MikeG wrote:
>
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got tight.
> I was able to look down the small push rod hole and observe the lifter. It
> was not doing a thing. I changed the rocker and push rod just incase one
> was bent etc. that I could not detect with my eye. The push rods were of
> equal length, and straight when rolled across the floor. The major concern
> now is that: if by chance the oil passage to that lifter or all lifters for
> that matter are clogged with crud of unknown substance, I don't feel safe
> unless I somhow clean them all out. Perhaps not ideal with the engine
> installed, and 2nd...what has happened to all the metal that was ground off
> of the cam? I know most of it is suspended in the oil, the filter probably
> has taken out some, but I am sure it circulated throught all the bearings.
> Last oil change was about 1000 miles ago, and I am guessing that this grind
> down has taken several thousand miles. Never noticed anything unusual in
> the oil. So.....my strategy will be to first pull the head, then the lifter
> and look at the cam. Priced a cam yesterday = $200.00 Yipes. Stay
> tuned!!!! TX Mike
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
MikeG wrote:
>
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got tight.
> I was able to look down the small push rod hole and observe the lifter. It
> was not doing a thing. I changed the rocker and push rod just incase one
> was bent etc. that I could not detect with my eye. The push rods were of
> equal length, and straight when rolled across the floor. The major concern
> now is that: if by chance the oil passage to that lifter or all lifters for
> that matter are clogged with crud of unknown substance, I don't feel safe
> unless I somhow clean them all out. Perhaps not ideal with the engine
> installed, and 2nd...what has happened to all the metal that was ground off
> of the cam? I know most of it is suspended in the oil, the filter probably
> has taken out some, but I am sure it circulated throught all the bearings.
> Last oil change was about 1000 miles ago, and I am guessing that this grind
> down has taken several thousand miles. Never noticed anything unusual in
> the oil. So.....my strategy will be to first pull the head, then the lifter
> and look at the cam. Priced a cam yesterday = $200.00 Yipes. Stay
> tuned!!!! TX Mike
05-20-2005, 09:46 PM
#39
Guest
Posts: n/a
Re: 6 cy engine problem
http://www.cranecams.com/?show=article&id=2
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
MikeG wrote:
>
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got tight.
> I was able to look down the small push rod hole and observe the lifter. It
> was not doing a thing. I changed the rocker and push rod just incase one
> was bent etc. that I could not detect with my eye. The push rods were of
> equal length, and straight when rolled across the floor. The major concern
> now is that: if by chance the oil passage to that lifter or all lifters for
> that matter are clogged with crud of unknown substance, I don't feel safe
> unless I somhow clean them all out. Perhaps not ideal with the engine
> installed, and 2nd...what has happened to all the metal that was ground off
> of the cam? I know most of it is suspended in the oil, the filter probably
> has taken out some, but I am sure it circulated throught all the bearings.
> Last oil change was about 1000 miles ago, and I am guessing that this grind
> down has taken several thousand miles. Never noticed anything unusual in
> the oil. So.....my strategy will be to first pull the head, then the lifter
> and look at the cam. Priced a cam yesterday = $200.00 Yipes. Stay
> tuned!!!! TX Mike
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
MikeG wrote:
>
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got tight.
> I was able to look down the small push rod hole and observe the lifter. It
> was not doing a thing. I changed the rocker and push rod just incase one
> was bent etc. that I could not detect with my eye. The push rods were of
> equal length, and straight when rolled across the floor. The major concern
> now is that: if by chance the oil passage to that lifter or all lifters for
> that matter are clogged with crud of unknown substance, I don't feel safe
> unless I somhow clean them all out. Perhaps not ideal with the engine
> installed, and 2nd...what has happened to all the metal that was ground off
> of the cam? I know most of it is suspended in the oil, the filter probably
> has taken out some, but I am sure it circulated throught all the bearings.
> Last oil change was about 1000 miles ago, and I am guessing that this grind
> down has taken several thousand miles. Never noticed anything unusual in
> the oil. So.....my strategy will be to first pull the head, then the lifter
> and look at the cam. Priced a cam yesterday = $200.00 Yipes. Stay
> tuned!!!! TX Mike
05-20-2005, 09:46 PM
#40
Guest
Posts: n/a
Re: 6 cy engine problem
http://www.cranecams.com/?show=article&id=2
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
MikeG wrote:
>
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got tight.
> I was able to look down the small push rod hole and observe the lifter. It
> was not doing a thing. I changed the rocker and push rod just incase one
> was bent etc. that I could not detect with my eye. The push rods were of
> equal length, and straight when rolled across the floor. The major concern
> now is that: if by chance the oil passage to that lifter or all lifters for
> that matter are clogged with crud of unknown substance, I don't feel safe
> unless I somhow clean them all out. Perhaps not ideal with the engine
> installed, and 2nd...what has happened to all the metal that was ground off
> of the cam? I know most of it is suspended in the oil, the filter probably
> has taken out some, but I am sure it circulated throught all the bearings.
> Last oil change was about 1000 miles ago, and I am guessing that this grind
> down has taken several thousand miles. Never noticed anything unusual in
> the oil. So.....my strategy will be to first pull the head, then the lifter
> and look at the cam. Priced a cam yesterday = $200.00 Yipes. Stay
> tuned!!!! TX Mike
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
MikeG wrote:
>
> Thanks for the very informative replys. As much as I can tell, and my
> limited logic on this, the majority of answers I have received is pointing
> to a rounded camshaft. I grounded out the coil, so that the engine would
> not start and 'jiggled' the rocker arm while cranking. It never got tight.
> I was able to look down the small push rod hole and observe the lifter. It
> was not doing a thing. I changed the rocker and push rod just incase one
> was bent etc. that I could not detect with my eye. The push rods were of
> equal length, and straight when rolled across the floor. The major concern
> now is that: if by chance the oil passage to that lifter or all lifters for
> that matter are clogged with crud of unknown substance, I don't feel safe
> unless I somhow clean them all out. Perhaps not ideal with the engine
> installed, and 2nd...what has happened to all the metal that was ground off
> of the cam? I know most of it is suspended in the oil, the filter probably
> has taken out some, but I am sure it circulated throught all the bearings.
> Last oil change was about 1000 miles ago, and I am guessing that this grind
> down has taken several thousand miles. Never noticed anything unusual in
> the oil. So.....my strategy will be to first pull the head, then the lifter
> and look at the cam. Priced a cam yesterday = $200.00 Yipes. Stay
> tuned!!!! TX Mike