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91 4.0 oil in oil filter


 
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luvthatsound40
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Joined: 16 Oct 2004
Location: MA

PostPosted: Wed Nov 10, 2004 3:57 pm    Post subject: 91 4.0 oil in oil filter Reply with quote

What causes this and how can I fix it?
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CoreyXJ
Turkish
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Joined: 20 Jan 2004
Location: Louisville, KY

PostPosted: Wed Nov 10, 2004 4:06 pm    Post subject: Reply with quote

I have looked everywhere, and in all the books that I have, but it seems like oil is supposed to go in the oil filter..... Who knew?

I think what you mean is oil in the AIR filter.

Usually what causes this is a blocked PCV valve (tube). Age is what really hurts it because the PCV (Positive Crankcase Ventilation) tube just gets full of crap and gets blocked. Pressurized oil works it way out of the tube (and sometimes even on the valvecover itself) and travels down the air tube and gets on the filter.

The easiest way to fix it on a Jeep motor is to replace the valve cover, gasket, and the tubes that connect with your air intake tube. A Jeep Horizons member did a write up on replacing the valve cover, and gives the proper part numbers - but I can't remember who it was. If I find it I will post it, but you may want to look around in the Write-Up section and see if you can find any info that helps.
It is a common problem on almost all cars, so its not a huge deal.
CoreyXJ
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ThePhantum
Pissed-Off Admin
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Joined: 23 Jan 2004
Location: I knew it...I'm surrounded by Assholes!

PostPosted: Wed Nov 10, 2004 7:16 pm    Post subject: Reply with quote

What he said. It's also called blowby. Here's a couple of writeups on how to fix it, including the part numbers you'll need.

http://www.off-road.com/jeep/cherokee/xjtech/engine/40ltr/blowby.htm
http://www.off-road.com/jeep/cherokee/98/04_apr/valvecover/cover.html

HTH

Steve
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luvthatsound40
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Joined: 16 Oct 2004
Location: MA

PostPosted: Thu Nov 11, 2004 5:07 pm    Post subject: Thanks for the responses Reply with quote

Yes, there's oil in my oil filter what was I thinking? Holy crap I just may have to take up a new hobby like drinking if I keep thinking like that...lol
but seriously thank you for the responses.
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