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Unread 09-26-2011, 07:15 AM   #1
Gymguyjeep
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Oil Leak Around Oil Filter Adapter

My 93 Cherokee is leaking oil where the 90 degree oil filter adapter mates with the engine block. It has been leaking ever since I have had the XJ, but cleaned up things this weekend and identified the source of the leak. I have tightened the adapter using a 3/8" hex wrench as tight as I can. Has anyone else had this problem and solved it? Is there a gasket of some sort inside the adapter where it would seal better to the engine block?

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Unread 09-26-2011, 08:01 AM   #2
Kettles
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Its an incredibly common problem, there are some o-rings on the inside, the big one that seals the adapter to the block gets hard and starts leaking.

You can buy an o-ring kit from most auto parts stores or the dealer for a couple bucks. I just called the dealer and asked for an "Oil filter adapter O-ring kit" I replaced my o-rings a few months ago.
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perfect depends on how far away you are when you look at it:D
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It's a 4.0 ... as long as there's something in the crank case that isn't coolant I'm sure it will still run forever.
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Unread 09-26-2011, 08:23 AM   #3
mbardeen
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I just fixed this over the weekend -- if you search around there's a lot of information out there about how to change the o-rings. The hardest part of doing this is finding the proper torx bit and getting the bolt out (it's in there *tight*).

T-60 is the bit you need. If you get a socket set that includes it, make sure it's removable from the socket (not a lot of space to get a socket wrench in there). I used a 12mm box wrench to hold it and a foot and half tube for leverage.
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Unread 09-26-2011, 08:28 AM   #4
TheBlueDevil
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had this same problem and the new o-ring kit sealed it right up. x2 on that torx bit technique!
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Unread 09-26-2011, 08:37 AM   #5
mbardeen
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Huh. I just re-read your post. Your filter adaptor has the hex bolt in there? Lucky! Sounds like you have the proper tool already. Just get the o-rings from the dealer, pop it off, replace the rings, and reinstall. Really that simple.

There's 3 rings, two small ones for the bolt and one large one where the adaptor attaches to the engine. On mine, the ones on the bolt looked like they were still good, but the large one was flattened and brittle.
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Unread 09-26-2011, 08:59 AM   #6
Gymguyjeep
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Thanks Gentlemen.
I have called Advance Auto and will pick up the part this afternoon. I will go to Sears and see if I can get a T-60 Torx. I checked the tightness of the adapter this weekend with a 3/8" Hex wrench and it fit pretty snug. I'm not going to try to get this thing off without the proper tool. Stripping the Torx threads would be a disaster.
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1993 XJ Cherokee - 3" Lift, 31" tires
Previous Jeeps - 1981 CJ-5, 1985 CJ-7
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Unread 09-26-2011, 09:40 AM   #7
mbardeen
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Well, check to see if it is indeed a torx head bolt first. Some Cherokees came with a hex (allen key type) bolt, and some with a regular bolt. I'm unsure which years came with which bolt.
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Unread 09-26-2011, 02:44 PM   #8
Kettles
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The torx ones are internal torx, so you can't put a hex wrench on it. They did come with hex bolts sometime, mostly on older models, so I wouldn't be surprised if it is hex. Us people with the torx ones have a much more interesting time. I managed to fit the t-60 bit (removed from socket) into a racheting wrench, and used a piece of square tubing for leverage.

Here was my writeup, but as said, its quite simple and if you have a hex head one, even easier. http://www.jeepforum.com/forum/f11/m...l#post11798386
__________________
_=====o000o
//__l_l_,\____\,____
l_--\_l__l_/--|lllll|
_.(o)_)__.(o)_)--o-)_)
"Dee", a Patriot Blue 2001 Cherokee Sport 4.0L High-Output Pictures Build Thread
The Rocket Sheep
"Live Free Or Die; Death Is Not The Worst of Evils." -General John Stark
Quote:
Originally Posted by speedbucket View Post
perfect depends on how far away you are when you look at it:D
Quote:
Originally Posted by Millermagic View Post
It's a 4.0 ... as long as there's something in the crank case that isn't coolant I'm sure it will still run forever.
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