1993 GMC Sierra oil pressure problem

Tiny
CHEVY350SB
  • 1993 GMC SIERRA

1993 GMC Sierra V8 Four Wheel Drive Automatic

i have a 1993 gmc sierra z71 with a 5.7L engine. Engine was replaced with a used one. My question is that "Why does my oil pressure drop down to 0 KPA after it has been running for a few minutes, but pressure is normal when the engine is cold? I replaced the oil pressure switch and my engine was running fine for about a week, now when the engine heats up the gauge on the dash drops to 0 kpa.

Do you
have the same problem?
Yes
No
Monday, October 26th, 2009 AT 6:59 PM

1 Reply

Tiny
RASMATAZ
  • MEMBER

Confirm the oil pressure with a mechanical gauge -if normal could be a faulty oil pressure switch abnormal could be oil pump or engine bearings. Try doing an engine flush

Was this
answer
helpful?
Yes
No
Monday, October 26th, 2009 AT 7:09 PM

Please login or register to post a reply.

Other Oil Pressure Sensor Replace/Remove Questions