11/15/19: I have been experiencing low oil pressure once the engine warms up, since I got the truck last February, I posed this question on Stovebolt forums a week or so ago. The general consensus was 5 lbs. at idle, was way too low for a full pressure 235.
I suspected that the bypass oil filter may not have had the restrictor orifice installed but was schooled on this forum that the orifice was internal to the filter housing. After removing, inspecting the filter and finding no issues, I installed pipe plugs to eliminate the filter until I diagnose the problem fully.
The lifters are prone to collapsing and take too long to pump up so it was suggested I clean and inspect the hydraulic lifters. Today I took out all the hydraulic lifters, one at a time, cleaned, reassembled, filled with oil, then reinstalled. At the same time, I cut slight grooves into the bottom of each pushrod to alleviate any trapped air as suggested by HRL. I followed Chev235Guyguidance.
They all looked like new and I found only one that collapsed. I reassembled everything and I’m waiting for a pushrod cover gasket I ordered before I continue. I want to run the engine to see if that solves the problem before I go into the crankcase.
Last edited by Phak1; 04/05/202012:30 PM.
Phil Moderator, The Engine Shop, Interiors and Project Journals
1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes Project Journals Stovebolt Gallery Forum