Oild is all over the bottom and exhaust manifold, but doesnt seem to be coming from oil pan, so Im thinking rear main seal? Also, a light tapping noise is coming from the rear cylinder on passenger side, what would this mean? Tapping quiets down after driven for a bit. How much would the rear main seal cost to replace?My 1990 Pontiac Firebird has a oil leak, where could it be coming from?
well you sure its oil pan not valve cover gaskets?
more common for gm.
anywho the motor has to be pulled turned upside down, oil pan comes off main bearing caps looseend not out!
replace seal and 15 hours later your done.
take it a shop please...
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