Mechanics

OIL PRESSURE

1990 Oldsmobile Ciera

1990 Oldsmobile Ciera 6 cyl Front Wheel Drive Automatic 331000 miles

a few weeks ago, the oil pressure went high, and off the numbers, I developed an oil leak which was the rear main, new oil switch, oil and filter and rear main installed, when it gets hot, car and hot temperature outside the oil pressure goes to less than 40 lbs and stalls at every stop. It has never done this before.
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Chuck welling
April 5, 2009.



Hello, if you have a lot of blowby in the crankcase, oil will leak everywhere. Check the pcv system, on a high-mileage engine it may not help much.

With the engine fully warmed up and idling, remove the oil fill cap, if smoke is puffing out like a freight train, that is blowby, My first thought is bad piston rings.

You might have more than one problem, can you check codes?

JDL
Apr 5, 2009.