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Remove the filter and check to see there's only one rubber seal, on the filter. Shouldn't be another one on the filter mount. Sometimes it sticks on there when you pull the old filter and you end up with two seals. That'll leak.
CF Veteran

Joined: Jul 2012
Posts: 1,185
Likes: 5
From: Pahrump, NV
Year: 1996
Model: Cherokee
Engine: 4.0L
Possibly oil filter adapter o-ring. Those are notorious.
If the filter is right size, it's on heavy hand tight, and old gasket is off, it should not leak, so that makes me think adapter o ring.
If the filter is right size, it's on heavy hand tight, and old gasket is off, it should not leak, so that makes me think adapter o ring.


