Re: Oil Pump Rebuilding Options?

Posted by JeromeSolberg On 2024/6/14 18:36:15

People sometimes add a spacer to the spring, it puts the peak pressure at > 35 psi (40 in your case), but reduces the slight bit of bypass at lower pressures from what I understand, so it gives you a slightly higher pressure at idle.

Ross would say that it's not a oil pressure problem that you are dealing with, but worn lifters. That's what worn lifters do, they tick at hot idle, because at idle is the longest time they have to hold pressure, since the engine is turning slowest. That was the problem in my case. All of these cars have pretty low oil pressure at hot idle, there was even a service bulletin/owners manual notice that indicated that the oil light may flicker at hot idle. Ross would say that, as long as there is oil there at all, the lifters should work, since they actually pump themselves up, they have a piston and a check valve, they suck oil from the oil gallery, not really get oil pumped into them. So as long as the oil galleries are full (oil pressure > 0) the lifters should work if they are not worn.