Just pulled mine off in about 5 minutes. Took longer to Jack the car up and get it on stands.
So the other day I was driving up the road to my parents house, gravel road going slow, and about 300 yards the oil pressure gauge suddenly went to 0, I didn’t shut it off immediately and continued until I got to the driveway and then shut it off. Motor was making all sorts of valve train clatter by then. I know there is a good chance I did further damage but it is what it is at this point.
So today I pulled the oil pump off to check it out. The relief valve doesn’t just slide out when you tip it on its side with the plug removed, should it? It comes out very easy though otherwise, but like I said it doesn’t just fall out.
Only a few other things I can think of if the pump checks out okay. Broken pickup tube or a sheared drive.