Question about 1997 Chevrolet Tahoe

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Oil pressure I rebuilt my engine with all new parts and when it warms up I have no oil pressure

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Also do not use 5w oil use heavier viscosity oil 15w40 or 20w will help keep oil pressure up

Posted on Apr 15, 2014


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Posted on Jan 02, 2017

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SOURCE: Oil pressure

At idle the oil pressure should be at least 20# at highway speed it should be at least 30# these pressures are on the low end higher is better.

Posted on Mar 29, 2009

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SOURCE: Have a 1999 Z71 chev truck with 5.3 L engine that

In some cases where the oil is not changed properly, the oil pump screen maybe plugging or your oil filter is defective. Fram is a good filter. If there is no problem found, replace the pressure sensor.

Posted on Jul 27, 2009

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SOURCE: While idling oil pressure is

Bad news. You are looking at replacing the crank and/or the rod bearings. They are worn. It is fine when the oil is cold and thick, but when the oil heats up it gets thinner and the gap in the bearing is too large to hold the pressure up. It will run like that for a long time but will get progressively worse until it is so low that you spin a bearing or you throw a rod. Just make sure that you keep the oil full, don't leave it idle any more than you need too, don't over rev it and try not to horse it. (don't make it work to hard) I have 289,000 and mine has been doing that for the last 70,000.

Posted on Sep 03, 2010

SOURCE: rebuilt 350 with low oil pressure

Did you rebuild it yourself? If so, did you remember the expansion plug behind the cam? Did you remember the 2 little 1/2" expansion plugs behind the timing gear?

Posted on Jul 02, 2012

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Why would my 2001 Sebring lxi 2.7l v6 rebuilt engine new sensors has oil light come on when stopping. why?

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It is likely that when you stop, and the engine returns to idle, the oil pump is not creating enough pressure to push oil up to the top of the engine and lubricate the valve assembly.
I hate being the bearer of bad news, but the plastic impellers in most modern oil pumps do fail over time, especially if they've been disturbed by the work associated with an engine rebuild. Or, it could be that it is not sitting right on the pickup and feed tubes, and they are being blocked and causing pickup problems at low RPMs. The solution will involved dropping the pan to figure out what's going on with the pump.

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Drops oil pressure an shuts off

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What should the oil pressure for a rebuilt engine

Pretty much dosen't matter which engine or manufacturer you are talking about, minimum pressure on a good rebuild should be at least 30psi at idle when completely warmed up.(I'd be happier with 40) If it were a used engine with lots of miles you could get away with 15 or 20, but with everything new, I'd be concerned if lower than 30.

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Lost oil pressure

i wouldnt worry about it untill it gets lower than 10 lbs,the oil does get thinner as it warms up,if it does get that low warm or cold,then the mains are getting bad.

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3 Answers

Oil pressure guage drops after engine warms up

Is it possible that you are using a different brand or weight of oil? 10w30 instead of 10w40 could potentially cause this.

Can also be caused by engine running warmer for some reason.

3 psi shouldn't be much of a concern.

You can try a heavier weight oil if you want it to be a little higher.

Apr 27, 2009 | 1997 Buick LeSabre

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