Oil pressure too high.
I recently purchased a 1957 GMC Panel truck with a rebuilt 350 Chevy engine (Casting number 3970010 1968-79). It has TPI from an 87' Camero. OBDII. O2 Sensors. Crank position sensor. No Cats. and about 200 miles on it.
At idle the oil pressure is almost 80 psi. and goes up from there when driven. This has caused the oil filler (with bypass) to push out. I think oil came out of the oil dip stick tube as well and has caused leaks from the timing chain cover and oil pan gasket.
I have replaced the following: Oil filler with bypass. Oil filler seal. Oil dip stick seal. Timing chain cover. Oil pan gasket. PCV Valve. Oil filter, Oil filter bypass and installed a stock oil pump. The oil pump I pulled was not High Volume and did not have a hi pressure spring.
The oil pressure has not changed. Any idea what might be causing the high pressure? Plumbing? Gaskets?
Thanks, Bob