10 lbs of oil pressure on engine break in..........

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xLURKxDOGx

xLURKxDOGx

"An angel fat, at satan's feast"
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Well, im at a frustrating loss as to why i have such low oil pressure at idle, so much so that the lifters are ticking really bad and see that there is not enough oil getting to the pushrods/rockers. When i rev it up it gets to about 30/35 but thats at around 26/2800 rpm, then back to low pressure.

This is a fresh build, .20 over stock pistons, stock crank, slightly loose bearing clearances but not exactly what i would think would translate to this issue. Any insight would be greatly appreciated.

Thanks,

Jake
 
The galley plug right in front of the intermediate shaft gear is also my guess
 
I panic on every rebuild trying to remember if I installed it.
I swear initial startup of a new engine is more stressfull than childbirth !
 
Did you prime the pump first, this is something I always do no mater what. It's a must to make sure before any install.
 
mbaird said:
the oil galley plug in the rear of block most likely not reinstalled.
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Thanks, i didnt check that and assumed they didnt remove it. I really hope thats what it is.

replicaracer43 said:
The galley plug right in front of the intermediate shaft gear is also my guess
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Thanks!

brian6pac said:
Stock oil pump or HV HP ?
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Stock pump, i was super worried because last build i had fairly high oil pressure 70 cold and 35/40 hot idle.

brian6pac said:
Did you prime the pump first, this is something I always do no mater what. It's a must to make sure before any install.
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I did prime it and it showed 35/40 but not the story since started.

Jake
 
I run loose bearing clearances also but I always run a HV HP pump 40 psi idle is great
70 revved up is also great, 10 psi per 1000 rpm, 7000 rpm 70 psi. The motor wont live long with those pressures you got. Pull the dist and see if the plug is in if it is pull the pan and change the pump.
 
Was your block boiled out? That oil galley plug could be the culprit.
Oil galley plug enlarged.jpg
 
Here's a long shot, but since you are looking around and will have the distributor pulled, pull your oil pressure sending unit, use a piece of coat hanger and poke it in the hole, should stop about 7 3/8 inches down, if it doesn't, here's the plug they forgot. Bad news is; it's pull the pan, pump and rear main cap to install.

Good luck and I hope it's something easy.
 
JBurch said:
Here's a long shot, but since you are looking around and will have the distributor pulled, pull your oil pressure sending unit, use a piece of coat hanger and poke it in the hole, should stop about 7 3/8 inches down, if it doesn't, here's the plug they forgot. Bad news is; it's pull the pan, pump and rear main cap to install.

Good luck and I hope it's something easy.
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Thanks! Im headed out to try all these excellent ideas! Thanks again to everyone for the insight.

Jake
 
JBurch said:
Here's a long shot, but since you are looking around and will have the distributor pulled, pull your oil pressure sending unit, use a piece of coat hanger and poke it in the hole, should stop about 7 3/8 inches down, if it doesn't, here's the plug they forgot. Bad news is; it's pull the pan, pump and rear main cap to install.

Good luck and I hope it's something easy.
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I did this and it stopped right at 7 3/8. Im assuming that means the plug is in there?

Jake
 
replicaracer43 said:
Pull distributor, verify galley plug, fast and easy
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I pulled the distributor and the intermediate shaft, the strange thing is the brass bushing cam with it. Is that bad? Also, now that its out, what exactly am i looking for?

Jake
 
xLURKxDOGx said:
I didnt but is it possible that a faulty oil pump gasket could cause an issue like this?

Jake
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if you used the studs in the back main you would of needed to clearance the oil pump . if not they just barely touch the oil pump and hold it up enough to cause a major leak between the pump and block. causing the problems you have .this is a problem ARP has known about for some time but has not addressed it .
 
did you mock up and check oil pan to pick up clearance? theres a oil gally plug in front of motor to left of cam and down a lil bit could be the issue to...
 
The intermediate shaft bushing came out of the block ? That is not good. Make sure it is in place tight when you replace it or it could spin in the block and turn to shrapnel.

xLURKxDOGx said:
I pulled the distributor and the intermediate shaft, the strange thing is the brass bushing cam with it. Is that bad? Also, now that its out, what exactly am i looking for?

Jake
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Did the shaft get lodged in the bushing ? Will the bushing slide off the shaft easily ? Spin easily ?
 
mbaird said:
Did the shaft get lodged in the bushing ? Will the bushing slide off the shaft easily ? Spin easily ?
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It is a tight fit, ill take some scotch bite to the shaft, or is getting a new bushing the better solution?

Jake
 
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