Update on my low oil pressure problem
06-25-07, 11:00 AM
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Update on my low oil pressure problem
From my previous post:
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At cold start I see 60psi, then 30 until the car warms up.
When fully warm the oil pressure reads
Idle 4-5 psi
2000rpm 25 psi
3000rpm 45 psi
Ordered an o-ring for the front housing, and replaced it, but there were no signs of the o-ring being the problem. Assembled with rtv gasket maker.
Still no change in oil pressure. However upon doing this I noticed that there was oil pooling on top of the engine under neath where the fuel rail is, just above where the lower intake manifold bolts to the block, white arrow in the pitcures. I removed the upper intake manifold to check the oil metering lines. these lines have about 3000 miles on them and there are no signs of cracks, but perhaps this is where the problem lies. Has anyone had a problem with new nylon lines, is there anyone that sells a copper or steel metering line set? Where else could the oil be coming from?
I plan on replacing these lines and while I'm at it replacing the oil pump as well. All signs indicate the oil pump is fine, it will get to about 55-60psi around 4500rpm, but also I want to eliminate it as a potential problem.
------------------------------------------
This weekend I replaced the Oil pump and chain, the pressure bypass valve, and the pressure regulator valve above the oil pan in the back of the block. I used a 3rd gen spring in the bypass and a 3rd gen regulator.
This doesn't appear to have fixed the problem, but now the oil pressure stays at a range that doesn't worry me anymore.
Cold Start: 110+ psi
After warmed up-
Idle: 25 psi
3000rpm 60-65psi
5000rpm+ 70-80psi
I think there is still something wrong, and most likely it is a failed regulator internal to the engine which I am not thinking about replacing anytime soon.
So everything I have replaced:
Billet Thermal Pellet
Oil Pump and Chain
Oil Pump bypass spring with 3rd gen
Oil Pump pressure regulator with 3rd gen
Oil Cooler
Front cover O-ring
---There was a post where someone had this similar problem, they reposted that they had fixed the problem but didn't describe the solution - if you read this please post what you did to solve the problem!
If anyone has additional suggestions please let me know.
---------------------------------------
At cold start I see 60psi, then 30 until the car warms up.
When fully warm the oil pressure reads
Idle 4-5 psi
2000rpm 25 psi
3000rpm 45 psi
Ordered an o-ring for the front housing, and replaced it, but there were no signs of the o-ring being the problem. Assembled with rtv gasket maker.
Still no change in oil pressure. However upon doing this I noticed that there was oil pooling on top of the engine under neath where the fuel rail is, just above where the lower intake manifold bolts to the block, white arrow in the pitcures. I removed the upper intake manifold to check the oil metering lines. these lines have about 3000 miles on them and there are no signs of cracks, but perhaps this is where the problem lies. Has anyone had a problem with new nylon lines, is there anyone that sells a copper or steel metering line set? Where else could the oil be coming from?
I plan on replacing these lines and while I'm at it replacing the oil pump as well. All signs indicate the oil pump is fine, it will get to about 55-60psi around 4500rpm, but also I want to eliminate it as a potential problem.
------------------------------------------
This weekend I replaced the Oil pump and chain, the pressure bypass valve, and the pressure regulator valve above the oil pan in the back of the block. I used a 3rd gen spring in the bypass and a 3rd gen regulator.
This doesn't appear to have fixed the problem, but now the oil pressure stays at a range that doesn't worry me anymore.
Cold Start: 110+ psi
After warmed up-
Idle: 25 psi
3000rpm 60-65psi
5000rpm+ 70-80psi
I think there is still something wrong, and most likely it is a failed regulator internal to the engine which I am not thinking about replacing anytime soon.
So everything I have replaced:
Billet Thermal Pellet
Oil Pump and Chain
Oil Pump bypass spring with 3rd gen
Oil Pump pressure regulator with 3rd gen
Oil Cooler
Front cover O-ring
---There was a post where someone had this similar problem, they reposted that they had fixed the problem but didn't describe the solution - if you read this please post what you did to solve the problem!
If anyone has additional suggestions please let me know.
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