How long can rear main seal leak go on?
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Joined: Aug 2019
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From: East Tennessee
Year: 1996
Model: Cherokee (XJ)
Engine: 242 cui
Recently replaced valve cover gasket with the good fel-pro part. No oil leaks from valve cover, head is dry down to head gasket.
Oil seepage from head gasket, from about between cylinder 2/3 back.
And rear of oil pan I see oil leakage above drain plug.
Head seepage seems common per comments from earlier post about it.
If I have a rear main leak, is there any urgency at all to fix?
Oil seepage from head gasket, from about between cylinder 2/3 back.
And rear of oil pan I see oil leakage above drain plug.
Head seepage seems common per comments from earlier post about it.
If I have a rear main leak, is there any urgency at all to fix?
Yeah, slight weeping along the passenger side head gasket is common. No rush on the rear main. I assume you've ruled out the oil filter adapter area a the source too. Typically that drips on the starter too.
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CF Veteran




Joined: Aug 2019
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From: East Tennessee
Year: 1996
Model: Cherokee (XJ)
Engine: 242 cui
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Thread Starter
CF Veteran




Joined: Aug 2019
Posts: 1,601
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From: East Tennessee
Year: 1996
Model: Cherokee (XJ)
Engine: 242 cui
Looks like it's just head gasket seepage at this point. Cleaned everything down better with diluted Dawn, and after a couple days of daily driving, no oil at back of oil pan. Just seepage on passenger side of head/block seam.
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From: San Mateo, CA
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0 Renix, stock.
If that dont fix it, then a head gasket replacement may be needed.
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Joined: Aug 2019
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From: East Tennessee
Year: 1996
Model: Cherokee (XJ)
Engine: 242 cui
Oil consumption has dropped drastically. Didn't notice any difference on dip stick in two fill ups. Before replacing valve cover gasket, I would have seen something and be looking at getting a quart for the next fill up or so.
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Thats a very good question!
