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Oil pressure problem

Tiny
JONSANFORD
  • MEMBER
  • 2001 GMC SONOMA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 104,000 MILES
2.2l gmc sonoma low oil pressure?
Wednesday, January 12th, 2011 AT 9:04 PM

3 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
I'd use a mechanical gage in place of the oil sending unit. See if that gage and the gage on your dash read the same? I didn't see a minimum spec for the four cylinder. 56 psi@3000 rpms. I did see idle spec for the 6 cylinder, oil pressure minimum, 6psi. You may need to check compression.
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Wednesday, January 12th, 2011 AT 9:30 PM
Tiny
JONSANFORD
  • MEMBER
  • 2 POSTS
I checked I for sure have low oil pressure. Starts out fine but as engine warms up pressure continues to drop. Already checked the pump starting to pull bearings caps now
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Wednesday, January 12th, 2011 AT 9:53 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
If I was going into the engine, I'd replace the pump anyway.
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Thursday, March 3rd, 2011 AT 7:47 PM

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