Low oil pressure after reaching operating temperature

1993 GMC VANDURA
111,000 MILES • 5.0L • V8 • 2WD • AUTOMATIC
Avatar
MCAMPBELL 459
  • MEMBER
  • 2 POSTS
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?
Oct 22, 2018 at 8:02 AM
Advertisement
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 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
Image (Click to enlarge)
Attached Media
Oct 23, 2018 at 11:26 AM
Avatar
MCAMPBELL 459
  • MEMBER
  • 2 POSTS
Sending unit fixed the problem. Thank you
Oct 26, 2018 at 8:47 AM
Advertisement
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken
Oct 26, 2018 at 10:38 AM