Normal LS1 oil pressure??
#1
Normal LS1 oil pressure??
Ok so I bought my 2001 Camaro SS (LS1) Early last year. And it was running around 45psi at hot idle. And cruising highway speeds around 60psi. I build the top end and put a cam in it. Since then it's been having what I believe is a problem. At first start up the oil pressure is around 50psi. When the car warms it goes to 40-45. But after driving for 30-60 minutes. The idle pressure is between 25-30 and driving At highway speeds the pressure stays around 35..... any help or answers would be great! Ls1, 243 ported heads, ms3 cam, ls6 intake, etc etc
#2
TECH Senior Member
That's actually not bad. These engines don't normally run very high pressures. How many miles?
#3
If it happened the same time you changed the cam its possible the cam bearings are on the loose side with the new cam. What you could have done is measure the old cam journals to the new cam and see how much difference there is.
#4
#5
that's s good point thanks. Normally when a car warms up the pressure stays around the same right? What would cause it to decrease another 20psi after it was already warm?
#6
TECH Resident
The funny thing is that the current description is what gm considers normal. Your original pressure would be considered extremely high. The pressure is measured in relation to rpm so cruising down the highway at 2k rpm you shouldn't be anywhere near 60 psi unless you have a high pressure pump and even then that seems a bit high.
#7
11 Second Club
iTrader: (3)
The funny thing is that the current description is what gm considers normal. Your original pressure would be considered extremely high. The pressure is measured in relation to rpm so cruising down the highway at 2k rpm you shouldn't be anywhere near 60 psi unless you have a high pressure pump and even then that seems a bit high.
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#9
TECH Junkie
iTrader: (4)
Ok so I bought my 2001 Camaro SS (LS1) Early last year. And it was running around 45psi at hot idle. And cruising highway speeds around 60psi. I build the top end and put a cam in it. Since then it's been having what I believe is a problem. At first start up the oil pressure is around 50psi. When the car warms it goes to 40-45. But after driving for 30-60 minutes. The idle pressure is between 25-30 and driving At highway speeds the pressure stays around 35..... any help or answers would be great! Ls1, 243 ported heads, ms3 cam, ls6 intake, etc etc
#10
11 Second Club
iTrader: (3)
Ok so I bought my 2001 Camaro SS (LS1) Early last year. And it was running around 45psi at hot idle. And cruising highway speeds around 60psi. I build the top end and put a cam in it. Since then it's been having what I believe is a problem. At first start up the oil pressure is around 50psi. When the car warms it goes to 40-45. But after driving for 30-60 minutes. The idle pressure is between 25-30 and driving At highway speeds the pressure stays around 35..... any help or answers would be great! Ls1, 243 ported heads, ms3 cam, ls6 intake, etc etc
#11
If the oil looks clean from metal and the engine is quiet I wouldn't worry over it. Only thing you could realistically do is go back in check the cam bearing sizes against your new cam journals and replace the cam retainer plate. Not really worth doing because you can't change the cam bearings in the car any ways. Personally I think you're ok. unless it gets worse. You could also use some Lucas Synthetic oil additive. It will help to up the oil pressure and add protection. I use it in all my engines, great stuff as long as you only use the Synthetic version. The thick snotty Lucas is for engines that are worn out IMO.
One other problem could be the oil pickup tube oil ring leaking air into the oil stream but I doubt thts your problem because if it were you would be experiencing loud tapping lifters at times.
#13
TECH Fanatic
iTrader: (7)
All engines drop oil pressure as the oil gets hot and thins out. Most I would say drop 20psi from cold to hot example would be If I start my car cold the oil pressure hangs around 60, as it warms up it will drop to 40. Yours starts at 50 and drops to 25-30, I wouldn't say that bad but it is lower than stock.
If the oil looks clean from metal and the engine is quiet I wouldn't worry over it. Only thing you could realistically do is go back in check the cam bearing sizes against your new cam journals and replace the cam retainer plate. Not really worth doing because you can't change the cam bearings in the car any ways. Personally I think you're ok. unless it gets worse. You could also use some Lucas Synthetic oil additive. It will help to up the oil pressure and add protection. I use it in all my engines, great stuff as long as you only use the Synthetic version. The thick snotty Lucas is for engines that are worn out IMO.
One other problem could be the oil pickup tube oil ring leaking air into the oil stream but I doubt thts your problem because if it were you would be experiencing loud tapping lifters at times.
If the oil looks clean from metal and the engine is quiet I wouldn't worry over it. Only thing you could realistically do is go back in check the cam bearing sizes against your new cam journals and replace the cam retainer plate. Not really worth doing because you can't change the cam bearings in the car any ways. Personally I think you're ok. unless it gets worse. You could also use some Lucas Synthetic oil additive. It will help to up the oil pressure and add protection. I use it in all my engines, great stuff as long as you only use the Synthetic version. The thick snotty Lucas is for engines that are worn out IMO.
One other problem could be the oil pickup tube oil ring leaking air into the oil stream but I doubt thts your problem because if it were you would be experiencing loud tapping lifters at times.
#14
All engines drop oil pressure as the oil gets hot and thins out. Most I would say drop 20psi from cold to hot example would be If I start my car cold the oil pressure hangs around 60, as it warms up it will drop to 40. Yours starts at 50 and drops to 25-30, I wouldn't say that bad but it is lower than stock.
If the oil looks clean from metal and the engine is quiet I wouldn't worry over it. Only thing you could realistically do is go back in check the cam bearing sizes against your new cam journals and replace the cam retainer plate. Not really worth doing because you can't change the cam bearings in the car any ways. Personally I think you're ok. unless it gets worse. You could also use some Lucas Synthetic oil additive. It will help to up the oil pressure and add protection. I use it in all my engines, great stuff as long as you only use the Synthetic version. The thick snotty Lucas is for engines that are worn out IMO.
One other problem could be the oil pickup tube oil ring leaking air into the oil stream but I doubt thts your problem because if it were you would be experiencing loud tapping lifters at times.
If the oil looks clean from metal and the engine is quiet I wouldn't worry over it. Only thing you could realistically do is go back in check the cam bearing sizes against your new cam journals and replace the cam retainer plate. Not really worth doing because you can't change the cam bearings in the car any ways. Personally I think you're ok. unless it gets worse. You could also use some Lucas Synthetic oil additive. It will help to up the oil pressure and add protection. I use it in all my engines, great stuff as long as you only use the Synthetic version. The thick snotty Lucas is for engines that are worn out IMO.
One other problem could be the oil pickup tube oil ring leaking air into the oil stream but I doubt thts your problem because if it were you would be experiencing loud tapping lifters at times.
#15
TECH Senior Member
By loosening the oil pump, you MIGHT have messed up the O-ring in the pickup tube. That would put bubbles in the system, causing additional valve noise.
#16
#17
TECH Senior Member
That's usually it, unless the pickup tube is cracked.
#19
TECH Senior Member
If the O-ring is old, change it. No snake-oil fixes need apply here.