to me this is the worst!
Thread Starter
CF Veteran
Joined: Dec 2009
Posts: 1,882
Likes: 0
From: Oxford NC
Year: 1998
Model: Cherokee
Engine: 4.0L
well........ all this time i thought my valve seals were bad. noticed going down the road it periodicaly smokes... correct me if im wrong but my rings are bad right?..
Last edited by ckysodkorn_xj; Feb 9, 2010 at 08:01 PM.
Senior Member
Joined: Sep 2008
Posts: 897
Likes: 12
From: Sioux Falls, SD
Year: 1999
Model: Cherokee(XJ)
Engine: 4.0L
Rent a compression tester and give it hell. Do a dry and wet test and write down your findings. Mother Mopar used hard rings and hard steel for the bores so I am leaning towards valve guides/seals are worn.
Do a compression test..
Do a compression test..
CF Veteran
Joined: Jan 2010
Posts: 3,379
Likes: 0
From: Forest, VA
Year: 1999
Model: Cherokee
Engine: 4.0 I6
are you experienced enough to take the valve cover off and take a peek in there? doesn't take any specialty tools.
oh, you can also take off the manifolds and look in there, see if you can spot oil residue.
I had a mighty max that smoked out streets all the time. found out that it threw out a valve guide and i was too lazy to look for it. after the mechanic charged me $345 to do some unnecessary minor maintenance and tell me that he's sure i have busted a ring, i took off the exhaust manifold and actually felt in there and found the problem. I was going through 1 quart per 100-120 miles. although i was getting more power because of the backpressure created on exhaust side by burning oil.
oh, you can also take off the manifolds and look in there, see if you can spot oil residue.
I had a mighty max that smoked out streets all the time. found out that it threw out a valve guide and i was too lazy to look for it. after the mechanic charged me $345 to do some unnecessary minor maintenance and tell me that he's sure i have busted a ring, i took off the exhaust manifold and actually felt in there and found the problem. I was going through 1 quart per 100-120 miles. although i was getting more power because of the backpressure created on exhaust side by burning oil.
Seasoned Member
Joined: May 2009
Posts: 279
Likes: 0
From: olive branch, ms
Year: 2000
Model: Cherokee
Engine: 4.0
sorry your jeep needs a little motor work, but i'd rather flip mine, total it out, break both my legs then to find out I or a loved one has cancer ever again. just my personal choice I guess.
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Thread Starter
CF Veteran
Joined: Dec 2009
Posts: 1,882
Likes: 0
From: Oxford NC
Year: 1998
Model: Cherokee
Engine: 4.0L
anybody know what happend to interstate motors? and yeah i just thought about it bad choice of words.. specialy sence i just got out of a funeral last saturday from someone who died of cancer and i cried my eyes out. but interstate motors was a company that traded rebuild motors for ones that need a rebuild.. cant find them anywhere.
Thread Starter
CF Veteran
Joined: Dec 2009
Posts: 1,882
Likes: 0
From: Oxford NC
Year: 1998
Model: Cherokee
Engine: 4.0L
are you experienced enough to take the valve cover off and take a peek in there? doesn't take any specialty tools.
oh, you can also take off the manifolds and look in there, see if you can spot oil residue.
I had a mighty max that smoked out streets all the time. found out that it threw out a valve guide and i was too lazy to look for it. after the mechanic charged me $345 to do some unnecessary minor maintenance and tell me that he's sure i have busted a ring, i took off the exhaust manifold and actually felt in there and found the problem. I was going through 1 quart per 100-120 miles. although i was getting more power because of the backpressure created on exhaust side by burning oil.
oh, you can also take off the manifolds and look in there, see if you can spot oil residue.
I had a mighty max that smoked out streets all the time. found out that it threw out a valve guide and i was too lazy to look for it. after the mechanic charged me $345 to do some unnecessary minor maintenance and tell me that he's sure i have busted a ring, i took off the exhaust manifold and actually felt in there and found the problem. I was going through 1 quart per 100-120 miles. although i was getting more power because of the backpressure created on exhaust side by burning oil.
Seasoned Member
Joined: Jan 2010
Posts: 336
Likes: 0
From: Midlothian, VA
Year: 1996
Model: Cherokee
Engine: 4.0
CF Veteran
Joined: Aug 2008
Posts: 6,588
Likes: 495
From: Chico, CA
Year: 1986
Model: Cherokee
Engine: 4.3L with headers and full 3" exhaust system
if it is valve seals, it will smoke when you let off the gas. Oil blowing past the rings is when you get on it or all the time, becoming worse under acceleration.
Seasoned Member
Joined: Nov 2009
Posts: 279
Likes: 0
From: sarasota Fl
Year: 91
Model: Cherokee
Engine: 5.9
If there not completeley shot just runing some marvel misterey oil through with your gas does a great job for your whole valvetrain. If you suspect the rings just pull the plugs and pour marvel misterey oil in each cylender and let it sit for a day and alot of times the rings will reseat themselves. It only costs a few bucks and worst case cenario is it wont do anything.If its only a little bit of smoke I would bet that would fix it.
Thread Starter
CF Veteran
Joined: Dec 2009
Posts: 1,882
Likes: 0
From: Oxford NC
Year: 1998
Model: Cherokee
Engine: 4.0L
If there not completeley shot just runing some marvel misterey oil through with your gas does a great job for your whole valvetrain. If you suspect the rings just pull the plugs and pour marvel misterey oil in each cylender and let it sit for a day and alot of times the rings will reseat themselves. It only costs a few bucks and worst case cenario is it wont do anything.If its only a little bit of smoke I would bet that would fix it.


