1990 Chevy Corsica Low Oil Pressure

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WOLF31
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  • 1 POST
I have a 1990 chevy corsica, 3.1L V6, 183,000 miles. My oil pressure has been low lately and after it runs for a while, when I come to a stop light/sign the oil pressure will bottom out. I don't notice any difference in the sound of the engine, it doesn't stall, or idle differently, just bottoms out. I have checked my oil and it is fine, not low or anything. My oil light or check engine light has never come on, is it that it is just getting worn and old? Any Ideas??
Apr 13, 2006 at 1:48 AM
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LOSONE
  • ✓Experienced Mechanic
  • 1,616 POSTS
Thats a lot of miles on that engine. Have a mechanic check the oil pressure with a manual gauge. That will isolate the gauge circuit. I suspect the engine may be getting tired and loosing pressure internally but to be sure get it checked and go from there. Good luck
Apr 13, 2006 at 1:54 AM
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Suggested Repair

Have a mechanic verify oil pressure with a manual gauge to isolate the gauge circuit before assuming internal engine wear.

Conversation Summary

The owner of a 1990 Chevy Corsica 3.1L with 183,000 miles reports oil pressure dropping to the bottom at stops after the engine warms up, with no unusual noise, stalling, idle change, or warning lights, and the oil level is fine. The expert says the high-mileage engine may be losing pressure internally but recommends checking pressure with a manual gauge first to rule out a gauge-circuit problem.

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