Having problems with your Mercury Grand Marquis ?

Oil pressure problem 2002 4.6 mercury

\015 Oil pressure is at 50lbs at engine start up,(cold) after engine warms up pressure drops to what appears to be 0, off idle will increase to maybe 10 lbs, gage is a 300lb fluid filled,any ideas other than an oil pump.\015 Posted / edited by AnonymousUser on : 10-06-2019

Answers :

Well if you trust the gauge, the problem could be the pump or several other components. If the crank bearings are worn out, you will loose oil pressure as the engine warms up just as you would with a weak pump.
You won't know until you take the oil pan off and inspect.
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