1991 Chevrolet Blazer



February, 1, 2010 AT 2:59 PM

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?

2 Answers



February, 1, 2010 AT 3:33 PM

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)



February, 1, 2010 AT 3:46 PM

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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