Quote:
Originally Posted by Greg Jones
I have a newly rebuilt stock engine block and re-used a fairly new oil pump. Got it all together and checked the oil pressure (it's a stock, non-pressurized system) and using a 0-15 psi gage, the oil pressure pegged the gage. Normally at cold start up you should see about 5 psi and as the engine warms up the pressure drops. Yeah, I didn't pay a whole lot of attention to the oil pump as I have always regarded them as bullet proof. Time for me to rethink that thinking.
So...I have discussed this with my engine builder, and he has suggested some things. I thought I would toss this out to the crowd and see if anyone has experienced such a thing and what did they do about it.
I am of the mindset there is a restriction someplace creating an orifice effect and raising the pressure. I have not dropped the pan yet since my shop is freezing cold at the moment (hey, I'm 64 give me a break!) but will this coming week.
The engine started knocking which I think may have actually been moving the oil pump drive gear upwards, enough to get things out of place enough to make a noise.
My engine builder, a reputable guy, mentioned being sure there was a gasket in the bottom plate of the oil pump. Anyway, just asking if anyone else has come across this problem.
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I run a Mike's affordable side cover with a filter and, run10w30 mobile one
on start up cold it will run up to 20+ lbs until warmed up then its back down to where it should 4000 miles no issue's
also no gasket on bottom of pump