OIL PRESSURE FLUCTUATION - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-08-2005, 12:21 AM   #11
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I have the same problem with my car but doesnt go below 10 but pretty close. I was thinking maybe its the oil pump inside the oil pan?
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Old 07-08-2005, 12:22 AM   #12
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Quote:
Originally Posted by Pontiac1983
I have the same problem with my car but doesnt go below 10 but pretty close. I was thinking maybe its the oil pump inside the oil pan?
Get the car to a mechanic and have a mechanical oil pressure gauge hooked up to verify what the pressure REALLY is. If there'* a noticable difference, change your oil pressure sensor.

Change your oil and filter, too.
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Old 07-08-2005, 03:14 PM   #13
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Quote:
Originally Posted by willwren
Quote:
Originally Posted by Pontiac1983
I have the same problem with my car but doesnt go below 10 but pretty close. I was thinking maybe its the oil pump inside the oil pan?
Get the car to a mechanic and have a mechanical oil pressure gauge hooked up to verify what the pressure REALLY is. If there'* a noticable difference, change your oil pressure sensor.

Change your oil and filter, too.
Napa Part # for oil pressure sensor is OP6666
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Old 07-12-2005, 08:14 AM   #14
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When mine did that I ended up replacing the engine.
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Old 07-13-2005, 09:47 AM   #15
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Quote:
Originally Posted by laydbaak
When mine did that I ended up replacing the engine.
why replace the engine?
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Old 07-13-2005, 11:10 AM   #16
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When mine did that I ended up replacing the engine.
why replace the engine?
Probably because his oil pressure was low due to worn bearnings. That led to rod knock and a spun bearning. (Spun bearing is when you end up losing the bearing between crankshaft and connecting rod, hence no oil pressure, hence your motor is a paperweight)

The oil pressure sending unit is not the answer to all these problems. The low pressure should be checked asap with a mechanical gauge. Then if necessary replace the sender.
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