Oil Pressure - 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 07-18-2005, 01:33 AM   #1
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I was wondering what oil pressure everyone had in their SC cars? I am running between 60-80 nomally and 80-100 with the AC on. To me this seems high, but it has been pretty consistent and predictable within those ranges.

Also, could someone tell me if there is a voltage difference between an oil pressure sending unit from any of the years that could cause mine to read higher? Thanks
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Old 07-18-2005, 08:54 AM   #2
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I'm thinking your 95 sending unit is giving you overly high readings.

Why'd you put a 95 sender in a 93 car?

30 warm idle, 55 cruising altitude
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Old 07-18-2005, 09:08 AM   #3
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mines 40 idle and 60 running temp
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Old 07-18-2005, 09:33 AM   #4
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Bill, I'm actually not using the 95 one. When I got home to put it on the car, my dad had already had it replaced by the mechanic because it was switched with the engine and the replaced it under warrenty, so if you want the 95 back, i'll bring it out with me. As for which one replaced it, I am not sure, which is why I am wondering if they changed at all between the years in voltage needed.
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Old 07-18-2005, 09:35 AM   #5
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Hehe... oh darn you blew my theory out of the water!

It seems high. When the motor was replaced did they put a high volume oil pump in or anything like that?
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Old 07-18-2005, 09:38 AM   #6
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I am not sure. I know the motor is out of a park ave ultra, so I am not sure if they had a higher pressure rating. The pump had the checkvalve replaced as that is what went wrong on my other one. I am not too worried right now as it is steady and predictable, but I don't really like seeing it that high. I may just have to get a mechanical gauge hooked up and see what it'* doing.
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Old 07-18-2005, 09:46 AM   #7
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Exactly my next post. Know how I mentioned my temp is elevated. Maybe ur little board elevated your press.
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Old 07-18-2005, 09:49 AM   #8
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The board I changed out in the clusters were both from 93 Supercharged cars, so I am assuming they have the same range. But I will just have to test and see. Anyone know if the Autozone scanner can read Oil pressure for a 93?
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Old 07-18-2005, 09:54 AM   #9
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Quote:
Originally Posted by BillBost37
Exactly my next post. Know how I mentioned my temp is elevated. Maybe ur little board elevated your press.
usually if the temp is elevated everything is boost and oil pressure also
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Old 07-18-2005, 10:49 AM   #10
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Quote:
Originally Posted by Kennginn
Quote:
Originally Posted by BillBost37
Exactly my next post. Know how I mentioned my temp is elevated. Maybe ur little board elevated your press.
usually if the temp is elevated everything is boost and oil pressure also
Kenn... we are not on the same thing buddy. When I swapped my little pcb. I used the wrong year and my temp is off. Either the sender or cluster has a problem.

Geoff. Scanners won't do oil pressure. Needs to be a mechanical gauge.
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