High oil pressure - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-10-2007, 02:55 PM   #11
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Buttermore'* picture shows correctly what'* inside there, But this picture shows better what the oil filter adapter should look like on your car:
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Old 01-10-2007, 04:45 PM   #12
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I am running 5w30 oil, its like 32 degrees outside in the morning, even colder, so I ran the lighter oil for winter, I dont know the history of this car, I really just am concerned if this is ok to drive, if it sounds normal, then I wont worry about it, Id rather not spend the time to tear out the oil filter adapter and replace the parts if I dont need to, the only time I can work on my car is after work, when parts department is closed, so if i need something then im screwed, I just want to know if its bad enough pressure to go and investigate.
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Old 01-10-2007, 04:59 PM   #13
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sounds like you verified that you gauge is reading correctly. I don't think these numbers are out of the ordinary though. My 90 allways produces better oil pressure with 5w-30 in it. sometimes when hot while on the highway it will pin the gauge. Just the opposite of most cars.
Remember something about a sending unit being out of cal on our cars.
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Old 01-10-2007, 10:30 PM   #14
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Quote:
Originally Posted by jr's3800
On my 91 LN3 3800, I usually cold start at 70psi, Hot idle is usually 40 Psi, and anything above dead idle is 55-60 Psi...
Just another data point for you:

My 90 LN3 is about the same, 50psi (idle) to 60psi (1200rpm and up ) when the motor is running cold or hot. Once it comes off idle, it'* pretty much rock solid on the pressure gauge all the way up to redline. (Good Oil Pump!) Also running with 5w30 Dino oil and a PF47 filter.

I thought I had mis-wired the oil pressure sender when I added the SE gauge cluster to my LE, so I checked it with a mechanical gauge and got the same results. I'm really warming over to the oiling system design employed by the 3800.
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Old 01-11-2007, 12:05 AM   #15
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thats what mine is like, rock solid from 1500rpms up, Ive never taken her past 2800-3000 though, I take really good care of my cars and never beat on them, what is this Dino oil Ive heard a lot about?
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Old 01-11-2007, 01:11 AM   #16
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Dino is non synthetic

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Old 01-11-2007, 01:32 AM   #17
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first time Ive ever heard that term used, lol.
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Old 01-11-2007, 07:56 AM   #18
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It'* the real oil...from decomposed dinosaurs..
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Old 01-13-2007, 05:11 AM   #19
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Check out what the FSM says on this one...its says nothing that I can see about HIGH oil pressure. Odd.


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Old 01-13-2007, 10:24 AM   #20
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the longer I drive my car the slightly lower my pressure drops, well at least this is what my dash tells me, after driving for about an hour, at idle, according to the dash and not a mechanical gauge, I was at around 35psi at idle, and 60-65psi at any RPM above idle.
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