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Old 10-13-2012, 03:42 AM   eBay Motors  #1 (permalink)
FCM
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2.5L Jeep YJ - Water in Oil

My cousin brought me his YJ with a 2.5L saying that it kept overheating. Long story short, all the water was leaking into the oil pan.

I am being told that the engine had been "reworked" prior to it being given to me to fix. Part of the work was that the block and head were magnafluxed and new gaskets were put on the head. Supposably the head bolts weren't torqued down right and that was the reason he decided to bring it to me. I went ahead and replaced the head gasket and torqued the head bolts as per the Haynes manual.

I still have water in the oil. Not just a little, but a ten minute test drive nets me a half empty radiator. If the head and block passed the magnaflux test and a new head gasket was installed and torqued correctly, what other possibilities are there?

Update: I just disassembled the entire engine so I could really inspect it and as of yet cannot see anything. I still need to clean all the milk off of everything.
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Last edited by FCM; 10-13-2012 at 03:44 AM. Reason: Update
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Old 10-14-2012, 06:29 AM   eBay Motors  #2 (permalink)
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bump...
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Old 10-14-2012, 06:58 AM   eBay Motors  #3 (permalink)
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I do not keep up on Jeeps but how many places can they mix. Head, Block, is there an oil cooler? Was it put back together with reused head bolts?
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Old 10-14-2012, 07:25 AM   eBay Motors  #4 (permalink)
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was the head and block decked?

If not then there might be your problem, overheating leads to warpage, warpage leads to leaks around gaskets/seals ect.

Since it is disassembled I would have the block and head checked for how "true" it is. If it aint flat get it decked/milled
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Old 10-14-2012, 04:07 PM   eBay Motors  #5 (permalink)
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Good idea. I'll check how true they are and see what happens.
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Old 10-14-2012, 04:17 PM   eBay Motors  #6 (permalink)
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do the jeeps have a radiator that also has oil and or tranny coolers on the side?
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Old 10-15-2012, 07:36 AM   eBay Motors  #7 (permalink)
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Nope, no trans cooler or anything on this Jeep.
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Old 10-17-2012, 11:40 AM   eBay Motors  #8 (permalink)
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interested in the update here
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