1997 Chevy Astro oil pressure

Tiny
CASTERS1
  • MEMBER
  • 1997 CHEVROLET ASTRO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 171,200 MILES
I lost oil pressure then replaced the oil pump had 60psi for 2 minutes then 40psi now 15psi what is the cause.
Friday, August 21st, 2009 AT 9:21 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
The pump doesn't determine the pressure. The bearing clearances do. Is there any knocking sounds from the engine?

Also, did you clean the oil pan when it was off? Make sure the heads are draining oil back to the crank case. If the drains are plugged, they could prevent oil from getting to the pan.

One last thing to try first, make sure the oil sending unit is good.
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Thursday, September 3rd, 2009 AT 7:35 AM

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