. . .
At idle the relieve valve would never lift even in a properly working motor, as the normal oil pressure, at idle, is less than 10PSI (some trucks simply say 'any' pressure is OK.
. . .
pfarber, what year and engine are you referring to?
This discussion is about a high-pressure 261 (
high-pressure with 261 is redundant, but used here for emphasis).
Look this over and then educate us. I am not a trained mechanic but I have worked on 1940s 216s through 1960s 261a - I might not know what I read in manuals and I am ALWAYS ready to learn (and, I am am often apologizing for my mistakes, by thanking people for educating me).
