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Unread 01-29-2010, 01:21 PM   #1
Mike D
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Join Date: Jul 2004
Posts: 7
Oil leak on 2002 Grand Cherokee

I recently purchased a 2002 Grand Cherokee with the 4.0L 6 cylinder engine. I noticed the passenger side of the engine was very dirty and greasy. I cleaned the engine and determined the oil leak was coming from the valve cover gasket. I replaced the valve cover gasket and after about 2 weeks I inspected the passenger side of the engine and there was a thin film of oil on the side of it. I determined the oil leak was coming from the area where the head bolts to the block. There is no other leaks of any kind. Anyone have this problem and corrected it.

Thanks,

Mike

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Unread 01-29-2010, 02:01 PM   #2
sdowney717
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1998 ZJ 
 
Join Date: Apr 2009
Location: Virginia
Posts: 704
My 4.0L leaked from the oil filter adapter. The o-rings dry out and shrink.
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Unread 01-29-2010, 02:13 PM   #3
cmonson
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Join Date: Nov 2006
Location: Columbus
Posts: 1,546
could have been a film from when the oil filter was replaced.

It could also just be your oil filter gasket. It would be VERY hard to leak oil between the head and the block. If you had an oil leak between the head and block, you would most likely also have a coolant leak between the head and the block. If that was the case, you would also have a bad head gasket...

I wouldn't worry about it too much, but monitor it. Oil leaks aren't the end of the world... Where there is an oil leak, there won't be any rust.

I just finished restoring an old camaro that had a bad rear main most of its life. The bottom of the car was drentched in oil. B/C of that, the bottom of the car had absolutely ZERO rust on the bottom side all attributed to an oil leak. I also coat the bottom of my grand cherokee with a small film of oil a couple of times before and during winter. My 10 year old salt belt driven vehicle has ZERO rust on the bottom side where most others that are 10 years old do...
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