49 Plymouth
I pulled and sent engine to machine shop. Once work was completed, machine shop pointed out part of the oil pump housing was broke and missing (covering shaft). I ordered a new pump and am getting things lined up to put this engine back together. Playing with both pumps, I noticed the original pump had a little "catch", as if it was creating a vacuum. The new pump spun with no "catch", essentially spinning freely.
Why the difference? Does my rambling make sense?
Probably a simple answer, I just want to do this right the first time so that I'm not having to do it a second time.