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Low Oil Pressure Warning

Tiny
SOWSIAK
  • MEMBER
  • 1994 CADILLAC DEVILLE
  • V8
  • 2WD
  • 207 MILES
1994 Cadillac Deville (4.9L). Low Oil Pressure after idling for long period of time. At first the warning came on anytime at stop or short idles. Changed oil pressure signal which seemed to cure the problem. Now it's back after a very long delay in traffic. Checked with manometer and reading 15-13 psi after 5-10 minutes idle at operation temp? No noises from engine, runs smooth. Sound like a clog in screen? Or pressure relief valve? Not sure which way to go.
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Wednesday, February 23rd, 2011 AT 12:37 AM

5 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
What grade oil are you using and what is the average temp during the day?

Mark (mhpautos)
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Wednesday, February 23rd, 2011 AT 4:21 AM
Tiny
SOWSIAK
  • MEMBER
  • 3 POSTS
10W30, 25F outside temp.
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Wednesday, February 23rd, 2011 AT 10:55 AM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
At 207K I would be using 20W50 mineral, I think that will help a lot.

Mhpautos
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Wednesday, February 23rd, 2011 AT 11:17 AM
Tiny
SOWSIAK
  • MEMBER
  • 3 POSTS
Thank you I will give it a try. Do not use Synthetic or Blend?
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Wednesday, February 23rd, 2011 AT 12:41 PM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Full mineral I feel will be best.

Mark (mhpautos)
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Wednesday, February 23rd, 2011 AT 1:10 PM

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