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Low oil pressure after reaching operating temperature

Tiny
MCAMPBELL 459
  • MEMBER
  • 1993 GMC VANDURA
  • 5.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 111,000 MILES
Oil pressure is normal until vehicle warms up and idling when temperature is normal. Then drops close to orange, but the engine does not make any noise. Could this be the oil pressure sending unit?
Monday, October 22nd, 2018 AT 8:02 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,397 POSTS
Yes, it could be the oil pressure sending unit. I would change the oil and use 20/50 which will keep better pressure. Here is the oil pressure sender location below.

Here is a guide that can help check out the diagrams below.

https://www.2carpros.com/articles/how-to-change-engine-oil-and-filter

Check out the diagrams (below). Please let us know what happens.

Cheers, Ken
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Tuesday, October 23rd, 2018 AT 11:26 AM
Tiny
MCAMPBELL 459
  • MEMBER
  • 2 POSTS
Sending unit fixed the problem. Thank you
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Friday, October 26th, 2018 AT 8:47 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,397 POSTS
Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken
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Friday, October 26th, 2018 AT 10:38 AM

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