oil pressure 20# at idle and 45# reved up. is that low?
#1
oil pressure 20# at idle and 45# reved up. is that low?
this is my 1st ls1 and i was told that those number are pretty low.
any truth to that? i am about to the point of pulling the pan and checking the pickup tube and o-ring. is there another o ring that gets pinched in the pump?
any truth to that? i am about to the point of pulling the pan and checking the pickup tube and o-ring. is there another o ring that gets pinched in the pump?
#6
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40 (psi, I suppose) is what mine usually runs idling hot. Who says the gauge is always right though? Like BennyB suggested, definitely change the oil and filter to eliminate that possibility first.
#7
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run a search. I know alot of guys on here still quote the 10 psi for every 1k rpm rule. It is not that uncommon if the motor has some age on it to show a lower psi when warmed up. Most of this being due to clearances and normal wear and tear. Mine will drop to 30 on the 100 degree days sitting in traffic.
Is your car auto or manual. If it is a manual that could also be a reason you would read a little lower at idle.
Is your car auto or manual. If it is a manual that could also be a reason you would read a little lower at idle.
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#10
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An LS1 needs SEVEN pounds of oil pressure to float the crank at idle. Change the oil, maybe put a K&N oil filter on it (they flow extremely well, I noticed an 8 psi increase across the board over an AC Delco filter) but other than that leave it alone.
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Both the LS1's I have swapped into my '73 read about 25psi give or take a couple PSI depending on temperature, and would be about 40-45psi or so cruising down the road. Close to redline it'd be about 65PSI. This is on Stewart Warner Electrical gauges. I did hook up a mechanical gauge once to diagnose a bad oil pump and found my electrical SW gauge read a bit low.
I'd say your fine.
I'd say your fine.
#14
The pressure is adequate in either circumstance, but if you have stock clearances, then I would definitely check the o-ring, you don't want a piece broken off floating around somewhere.
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Weird, the 1999 Formy I have runs about 20-30 at idle. However it idles at about 500rpm. Now my 1989 with a LQ9 runs about 40-45 at idle, and idles at 950rpm.
Do you still have good pressure at cruise and under load? I usually see about 55-60 psi under load or highway cruise.
Do you still have good pressure at cruise and under load? I usually see about 55-60 psi under load or highway cruise.
#20