low psi...
08-29-2008, 08:58 AM
#1
Staging Lane
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low psi... my car runs at around 20-25 pounds of oil pressure no matter how fast or how high the rpms. shouldn't that be a little higher? and if so what could be the problem? thanks
T-Pat
T-Pat
08-29-2008, 08:19 PM
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Staging Lane
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09-01-2008, 01:42 AM
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If you're using 10W40 and getting pressures that low, then something is wrong. It's probably the oil pump needing replacement. You don't have any odd sounds like a knock or something in the motor, do you? If so, that might explain it.
I hope, for your sake, that it's just the oil pump. That's probably the cause.
I hope, for your sake, that it's just the oil pump. That's probably the cause.
09-02-2008, 11:56 AM
#12
You could hook up an oil pressure gauge directly to the motor, but that's kind of a pain in the ***. The oil pump is a relatively easy swap, should take about 3-4 hours.
09-02-2008, 12:00 PM
#13
When you change the oil pump, there will be 2 different size O-rings for the pickup tube. Always use the thicker of the two. I used the thinner one at first and had crappy oil pressure, so I had to tear the whole thing back apart and stick the thicker one in. I have 150K on my engine and it pulls 35PSI at 900 RPM idle and up to 65-75PSI at higher RPMs. Your engine should be fine once you replace the pump. If not, you have bearing issues.
09-02-2008, 12:56 PM
#14
When you change the oil pump, there will be 2 different size O-rings for the pickup tube. Always use the thicker of the two. I used the thinner one at first and had crappy oil pressure, so I had to tear the whole thing back apart and stick the thicker one in. I have 150K on my engine and it pulls 35PSI at 900 RPM idle and up to 65-75PSI at higher RPMs. Your engine should be fine once you replace the pump. If not, you have bearing issues.
09-02-2008, 10:54 PM
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theres a good chance that the oil pump could increase the pressure, but with 125k, possibly a hard 125k miles, theres probably some wear resulting in increased bearing clearances and causing low pressure, hopefully for you its just the pump, good luck!
09-03-2008, 12:51 AM
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More than likely your Oil Pump is having few issues, but also bearing clearances over time, pick up, etc. could be problems.
Hook up a mechanical gauge first to see if it is not the faulty GM gauges.
If still low, pick up an LS6 pump or high volume unit, and replace. Should be 3 hours or so. (While you are at it, you should add in a cam and what not too.
)
Hook up a mechanical gauge first to see if it is not the faulty GM gauges.
If still low, pick up an LS6 pump or high volume unit, and replace. Should be 3 hours or so. (While you are at it, you should add in a cam and what not too.
)
09-04-2008, 09:03 AM
#18
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ok, now sometimes my car shows between 35-40psi but it will eventually drop down to 20-ish. is that moreso the gauge acting up or can that still be the oil pump...