Low Oil Pressure, HELP!!
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Launching!
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From: Wright Patterson AFB
Low Oil Pressure, HELP!! I just installed a refreshed motor, with clevite race rod/main bearings, and im getting **** for oil pressure, I hooked up a mechanical pressure gauge to see if it was a electrical problem, and it red, 0 psi at idle and it jumps to about 25psi after 2K but doesn’t go past 30psi at any RPM. I have checked my oil Repeatedly for signs of a spun bearing, but it comes up clean every time. I have changed the oil, Oil filter, and oil pump, with no luck of oil pressure. I have also checked to O-ring if it was crimped. I called my machine shop and asked for the clearances of the main and rod bearings, and they were right on. I dont have any other ideas, and am very frustrated at this point, so any help or suggestions would be greatly appreciated.
Thanks
Thanks
Last edited by MRZ28; Jun 14, 2006 at 07:48 PM.
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Launching!
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From: Wright Patterson AFB
Originally Posted by 98LS-WON
Pressure regulator on the oil pump? Might need to add a few washers under the spring.
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Launching!
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From: Wright Patterson AFB
Originally Posted by 01350ss
I was about to say the little valve/seal/plug on the back of the block. I would not run that motor any more.
Alot of people have been saying that could be the problem, Im going to work on it tonight, and see if its in there. I hope thats the problem cause i really dont want to pull this engine again.
Originally Posted by MRZ28
what would cause that to happen, Ill try that next. Someone was telling me that when the machine shop hot tanked the block they may not have put back the oil plug that is in the back of the block, if that was the case wouldnt I have a leak?
There is also an oil plug on the front of the block......directly inline of the rear plug. The oil galley goes the whole way through.....
Here is one that might help. https://ls1tech.com/forums/generation-iii-internal-engine/513389-oil-pump-assembly.html
Or this one... https://ls1tech.com/forums/generation-iii-internal-engine/481722-important-there-oil-restrictor-barbell-restrictor-any-internal-oil-plug.html
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From: Portland Oregon
If the plastic barbell shaped plug is not in the back of the block, you will not have any oil pressure. If they hot tanked the plug, it could be screwed up.
I had major problems and tried everything, finally realized that the oil pump pickup was sitting on the bottom of the oil pan. The bracket that attaches to the main cap can be easily bent and result in the pickup tube being too low. If you have main studs, they will space that bracket down.
I had major problems and tried everything, finally realized that the oil pump pickup was sitting on the bottom of the oil pan. The bracket that attaches to the main cap can be easily bent and result in the pickup tube being too low. If you have main studs, they will space that bracket down.
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Launching!
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From: Wright Patterson AFB
Originally Posted by racecar
If the plastic barbell shaped plug is not in the back of the block, you will not have any oil pressure. If they hot tanked the plug, it could be screwed up.
I had major problems and tried everything, finally realized that the oil pump pickup was sitting on the bottom of the oil pan. The bracket that attaches to the main cap can be easily bent and result in the pickup tube being too low. If you have main studs, they will space that bracket down.
I had major problems and tried everything, finally realized that the oil pump pickup was sitting on the bottom of the oil pan. The bracket that attaches to the main cap can be easily bent and result in the pickup tube being too low. If you have main studs, they will space that bracket down.
See, that sounds like my problem, cause at idle which is set at 1000 RPM, it has 0 PSI, when i rev to about 2k it will jump to about 20-25 psi.
When I first changed my oil pump, I was reading over 40, today at Idle it stays around 30 a little lower maybe, and at a cruising gear of sixth it stays at 38, I still say mines to low, you might double check the O Ring.
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From: Wright Patterson AFB
Originally Posted by ninobrn99
who did u get the motor from?
you better hope that running that motor with no oil pressure at idle and very little pressure under light increased rpm/no load/light load didn't begin the breakdown process on the bearings. Eventhough you've repedetly checked the oil for signs of failure, that doesn't mean the damage has already been done. You may not see the damage for a little while yet.
Be aware!! I would seriously consider having that shop (or another) fully inspect all bearings for signs of premature wear.
Be aware!! I would seriously consider having that shop (or another) fully inspect all bearings for signs of premature wear.
Originally Posted by MRZ28
A local machine shop called Karios. I pulled the tranny today, and it Looks like they forgot to put back the rear oil plug/restrictor. Is Rear oil plug and the restrictor two different pieces, or it is one? Am i going to need a O ring when putting it back in?
It's one piece. Part number 12558340 for the plug. Oring will come with it.
