Low Oil Pressure? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 11-27-2006, 10:10 PM   #1
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Default Low Oil Pressure?

i have very low oile pressure at an idle when it goe to low the car shuts down i canged the sending unit same thing i also hooked up a mechanical gauge low oil pressure with that, 15psi at idle. i dont think it could be rod bearings there is no unusual noises.
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Old 11-27-2006, 11:05 PM   #2
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If this came on slowly, the probable cause is bearing wear. If it happened all of a sudden, maybe you have an oil pressure relief valve that is stuck open. I would disassemble the relief valve, and check it out to make sure it is not sticking. Perhaps buy a kit to replace the spring and valve. I'll try to find a picture for you.

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Old 11-27-2006, 11:23 PM   #3
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Like Dame suggested, if the spring loses tension, the relief valve will open too soon allowing oil to bypass the lubrication system and lowering the oil pressure. If that is the problem, a new spring will restore the pressure. I think the spring is set to open at about 60 psi.
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Old 11-27-2006, 11:29 PM   #4
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For those that didn't see it: I deleted my earlier reply because there'* really no reason for me and bill to say essentially the same thing, check the spring.
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Old 11-29-2006, 06:09 AM   #5
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thanks for the info guys
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Old 04-24-2008, 12:10 PM   #6
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where would i get one of these kits and does anyone happen to have a part number?
thanks in advance.
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Old 04-24-2008, 12:22 PM   #7
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Please don't dig up old topics. Feel free to start a new topic for your question.

Thanks!
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