Mechanics

CHECK GAGUES

1990 GMC C1500 • V8 2WD Automatic • 285,000 miles

1990 gmc pu, my check gauges lite came on and my oil pressure is registering past 60. What can cause that.
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Mno221
April 6, 2011.



Past 60psi-could be the oil pressure relief valve not opening-check it with a mechanical gauge

Rasmataz
Apr 6, 2011.
Thanks

Tiny
Mno221
Apr 6, 2011.
Is the oil pressure relief valve the same as the oil pressure switch, oreily only show a switch not valve?

Tiny
Mno221
Nov 14, 2011.
No, the oil pressure relief valve is in the oil pump-the switch reads the pressure-the oil pressure relief valve controls the oil pressure

Rasmataz
Nov 14, 2011.