Quote:

Oil pumps are constant volume pumps, meaning for a given rpm they pump a given volume of oil. They really don't make pressure, just flow.

So, it is the flow restriction downstream that determines what the pressure is at the outlet of the pump. If the flow restriction decreases, the pump pressure will decrease. That's what happens when clearances open up.

The only way to get increased pressure through a fixed restriction is to pump more volume. That's what the high volume pump does. It's Pumping 101. So if your oil pressure is decreasing because the clearances are opening up, a high volume pump should crutch the situation and allow you to get more miles out of that set of bearings.

R.


: correct