Mechanics

CHEVY LOW OIL PRESSURE

1997 Chevrolet Cavalier

Engine Performance problem
1997 Chevy Cavalier 4 cyl Front Wheel Drive Automatic 133000 miles

Hi. My oil pressure light flickers at warm idle. Like at stop lights but it only flickers and only when I come to a stop after the engine is warm. I have changed the oil numerous times. Upped the numbers from 5w 30 to 10w 30 which didn't help. Upgraded to pennzoil premium oil and it didn't help. The dipstick reads full. Whenever the oil pressure light comes on - the motor doesn't sound any different. No noises, knocking, ticking, etc.

I noticed that the pan behind my oil pan is absolutely covered in black sludgy looking oil. What is the pan behind the oil pan anyways?

Also, Today I was driving and my check engine light came on. Autozone said it was due to a misfire on cylinder #4.

Any suggestions or information would be helpful. Should I change the sending unit. Oil gasket? My brother suggested I put the car out of its misery but it runs so smooth for being an old car. My dad drove it and he said the car rode too nice to be having this kind of problem.
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Shelly213
June 21, 2010.




Misfire at cyl, no, 4 -check the sparkplug/compression and injector on this cylinder

No engine knocking noises-replace the oil pressure sending unit for the pan behind the oil pan should be the transmssion fluid pan. Nasty stuffs there could mean your rear crank seal is leaking or the oil pan gasket in that area-investigate

Tiny
Rasmataz
Jun 21, 2010.
Thank you for your quick response. Could the rear crank seal leaking or the oil pan gasket leaking be affecting the oil pressure?

Tiny
Shelly213
Jun 21, 2010.
If the oil level is up to the full mark whether its leaking or not and being monitorerd at all times and you still have a low oil pressure I suggest you check the oil pump, the pressure relief valve could be stuck open
AD

Tiny
Rasmataz
Jun 21, 2010.

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