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OIL PUMP PRESSURE

Tiny
ANDREW NORRIS
  • MEMBER
  • CHEVROLET SUBURBAN
CHEVROLET 1500 4WD SUBURBAN 350 VORTEC ENGINE BLEW OIL FILTER GASKET AND OIL OUT OF ENGINE. OIL PRESSURE WAS READING OVER 80. WAS NOT KNOCKING OR RUNNING HOT. REPLACED OIL FILTER AND OIL. FINALLY GOT IT STARTED AFTER IS SAT A COUPLE OF DAYS. HOWEVER THE OIL PRESSURE IS STILL OVER 80.

CAN YOU TELL ME WHAT CAUSED THIS AND HOW TO FIX IT.

THANKS

DREW NORRIS
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Monday, January 22nd, 2007 AT 11:06 AM

3 Replies

Tiny
CARUNDELL
  • MECHANIC
  • 602 POSTS
Hey Drew,
Some questions first. What viscosity oil do you use?. What was the outside are temp?. Was there a name brand oil filter used? Or some off brand? Let us know!

Chris
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Monday, January 22nd, 2007 AT 11:12 AM
Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
The maximum allowable pressure level is 60 psi, the oil pressure overcomes the spring pressure and allow the valve to open.
The oil pump pressure- relief valve need to be checked, it's may be stuck open.
To inspect or service the valve, you need to disasemble the lower part of the engine to gain access to the pump.
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Monday, January 22nd, 2007 AT 12:34 PM
Tiny
CARUNDELL
  • MECHANIC
  • 602 POSTS
A very real possibility M, but lets rule out some of the simpler things first.

Chris
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Monday, January 22nd, 2007 AT 1:03 PM

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