I have a '91 Crown Vic 5.0 that's developed an oil leak. It's on the driver
side and mainly effects the rear half of the block on that side.
So far I've eliminated the valve cover as the cause (totally dry) and I
don't suspect the oil pan ( I tightened the bolts. Plus the leak seems to be
coming from higher up on the block).
The oil hits the exhaust system either right above or below the exhaust
manifold/exhaust pipe joint. From there it runs down the tail pipe and burns
and generally making a mess.
Anybody care to take a crack at the source of the leak?
Exactly right. I had the identical situation and it was definitely the
manifold gasket. Under the PCV valve and grommet is a tightly packed mesh
screen about the diameter of a quarter and a half inch thick. It gets nasty
and eventually stops up. When it does, the pressure in the engine cannot be
relieved by the PCV and it starts destroying seals. Before I figured this
out, it ruined or weakened the intake manifold gasket, both valve cover
gaskets and the rear main seal on by '88 Crown Vic 5.0.
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