The Ford Barn - View Single Post - Question - C59A Oil Pressure Relief in Lifter Valley

jimTN · 04-15-2023, 03:34 PM

RR has it correct I just finished a engine using a late oil pump with both regulators in. Once the engine got hot, I had very little pressure. I read old posts from GM who suggested hard shimming the front relief valve down so I put a ground off 1/4" nut in the front cap. Problem solved. Pressure is 40 or better while driving and 10 or so idling. Those two valves were fighting each other.

04-15-2023, 03:34 PM	#19
jimTN Senior Member Join Date: May 2010 Location: Powell, TN Posts: 2,514	Re: Question - C59A Oil Pressure Relief in Lifter Valley RR has it correct I just finished a engine using a late oil pump with both regulators in. Once the engine got hot, I had very little pressure. I read old posts from GM who suggested hard shimming the front relief valve down so I put a ground off 1/4" nut in the front cap. Problem solved. Pressure is 40 or better while driving and 10 or so idling. Those two valves were fighting each other.