streetjeep2.5 Posted January 12, 2011 Share Posted January 12, 2011 Found this on allpar.com. In case you have a 4.0 oil leak that is escaping detection and don't know this already: "I owned a 1992 Cherokee with a 4.0 I-6. It had constant oil seepage from the rear of the engine. My dealer replaced the plastic valve cover with a die cast aluminum one with no success. I finally traced the oil to the oil filter mount. The o-rings that seal the oil filter mount are Nitrile (aka Buna-N, NBR) which have limited life. Replacing the o-rings with the same size but with 70 Durometer Viton rubber solved the leakage. My fix lasted the life of the vehicle." Link to comment Share on other sites More sharing options...
banshee Posted January 16, 2011 Share Posted January 16, 2011 good info, i'll keep it in mind Link to comment Share on other sites More sharing options...
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