Steve has it right. Oil pump with the teeth ground off. You can pull the proper oil pump, and insert this one which has a drive sticking out through the plug, which is O ringed to prevent oil passing. It had a socket headed drive. The long shaft has a hex key on the end. Insert it to the pump, (don't forget the plunger pin) and connect it to a drill and spin the pump. No bearings spinning dry, no cams spinning dry, oil going everywhere it should. All can be done without undoing another bolt. The a quick swap over to the proper pump, and it you are quick barely an ounce or two on the floor. Good to go!
So who can tell me which way to spin the pump?
Worldwide patents are held by the inventor and maker of this fine tool. For permission to copy, apply to Dan Smith c/o Not Another Clever Little Tool Enterprises, Vancouver BC
Now to start a real can. I recall that the picador engines were (when they figured out that bent props on landing was an issue) timed so that the props were horizontal when the engines stopped. It has been my contention that whether an engine sumps down may have something to do with what position the oil pump is in when the music stops and everyone is looking for a chair. When you look at the flats and think about where the openings are located when it all turns in for the night, that it is possible that oil may sneak past the pump easier when the pump is in a certain position. This could explain why a somewhat clapped out engine may not sump down as much as one that is brand new with everything absolutely perfect.
Thoughts?