1991 CHEVY BLAZER OIL PRESSURE

  • Tiny
  • lapseofstatic
  • 1991 Chevrolet Blazer

Engine Mechanical problem
1991 Chevy Blazer 6 cyl Two Wheel Drive Automatic 200000 miles

when the engine gets hot the oil pressure goes down and the check gauges light comes on when at idle at a redlight. I have to put the transmission on neutral and keep the idle up to maintain oil pressure. Would replacing the oil pump fix the issue or would it be something more complicated like crank bearings or sensor?

Monday, February 1st, 2010 AT 2:59 PM

2 Answers

  • Tiny
  • mhpautos
  • Expert
  • 29,790 posts

Hi there,

you first should get the oil pressure checked with a mechanical gauge, this will give you a true reading of engine oil pressure, check at cold idle, hot idle and hot 2000rpm, report the readings here.

Mark (mhpautos)

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Monday, February 1st, 2010 AT 3:33 PM
  • Tiny
  • rasmataz
  • Member

Do you have any type of engine knocking noises? Check the oil pressure with a mechanical gauge if normal replace the oil pressure switch abnormal could mean oil pump and engine bearings

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Monday, February 1st, 2010 AT 3:46 PM

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