Yes, I installed a new pump and same thing is happening.
Yes they are plastic. Very brittle when squeezed between my fingers
Yes they are plastic. Very brittle when squeezed between my fingers
No oil pressure, round two
- Thread starter Dieselcrawler
- Start date
Hey Corey, first I'm sorry for your troubles.
On the other hand, I do enjoy a good mystery
On the other hand, I do enjoy a good mystery
It doesn't feel like some sort of hardened old "create a gasket" that got it's shape by whay it was stuck to does it? That's really weird.
Hydro-idi
Full Access Member
If it is nothing that has been mentioned, then it must be foreign material that does not belong in the engine.
If your pressure hasn’t improved with an oil cooler & oil pump swap, sounds like it may be time to tear into that engine. Can’t think of anything else at this point. The oil pressure is bleeding of somewhere internally if everything else checks out.
If your pressure hasn’t improved with an oil cooler & oil pump swap, sounds like it may be time to tear into that engine. Can’t think of anything else at this point. The oil pressure is bleeding of somewhere internally if everything else checks out.
Did you use any plastic covers for the ports? Usually those are more malleable though... Could it be a cap from a bottle of assembly lube?
Look at the oil routing in the pic. There is no way for those pieces to get into the oil pan except thru the bypass hole from the oil filter. The oil galleys are only 1/2" in diameter, even the drain back holes in the heads are to small for the pieces to pass thru if they got in the oil fill spout. The oil pump being a gear pump is capable of pumping a very Hi pressure, it can't be completely blocked, the pressure has to be going back into the pan thru the oil pressure relief hole. I would say those pieces were in the oil cooler header when you changed the oil cooler, it's possible that the oil galley port is partially blocked.
I would pull the oil cooler and check for more pieces and see if the oil bypass is stuck open.
I would pull the oil cooler and check for more pieces and see if the oil bypass is stuck open.
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Anyone have a pic of the oil galley plugs on the front of the engine?
Tore the front end down, front oil galley plugs are in place and tight. Tomorrow I am going to swap ANOTHER oil cooler onto it and see. If that doesn't do it, another engine will be procured and this one will be used to take my anger out with my 10 lb sledge and some lead....
Im imagining something like this
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icanfixall
Official GMM hand model
If the front of the engine is off you can remove the oil galley plugs and run something thru to the back plugs. My new wag is something plugged up the oil pump pickup screen. Not sure if or how you checked if that was clear. Also check where the oil pump bolts to the engine. there is no gasket between the pump and the block but... There is a gasket between the pump pickup tube and the oil pump.
Gary, I replaced the pickup and pump last night. Tube is clear.
OK, new update. After fighting getting the plug out down on the driverside, I stuck my gauge there. Boom, 45 lbs at idle. So it has oil pressure on the bottom end, but still nothing up top.
Reading oldbulls picture, the tappets and piston squirters get fed from the same galley. All 8 of them were still in place
Guess everyone is as stumped as I am.
Just thinking out loud here.
So you’ve got oil pressure after the oil cooler correct? You checked it in the main oil galley? No oil pressure at the standard gauge port on the back? Stupid question. Is it a geyser with the sender port open? Could that passage be blocked? It was making lifter noises though right? Aside from either problems with lifters or cam bearings being totally wiped out or a squirter dumping more than it should I really don’t know what else could cause no oil up top If you have oil pressure in the lower galleys. It’s got to be going somewhere. Have you ran it without the valve covers? Are any of the pushrods oiling? Might help isolate the search if some are and some aren’t.
Don’t know if any of that rambling was helpful or not.
So you’ve got oil pressure after the oil cooler correct? You checked it in the main oil galley? No oil pressure at the standard gauge port on the back? Stupid question. Is it a geyser with the sender port open? Could that passage be blocked? It was making lifter noises though right? Aside from either problems with lifters or cam bearings being totally wiped out or a squirter dumping more than it should I really don’t know what else could cause no oil up top If you have oil pressure in the lower galleys. It’s got to be going somewhere. Have you ran it without the valve covers? Are any of the pushrods oiling? Might help isolate the search if some are and some aren’t.
Don’t know if any of that rambling was helpful or not.
