I'm changing my 4.0 replacing with a long block. There is a cap or cover over the oil pump drive. How do you remove this? Would pictures help? Any help would be greatly appreciated thanks from a new member.

 

Welcome to the forum

Not a cap, its the drive, remove the bolt and "fork" holder
Then pry up the drive "cap", it just has a rubber o-ring holding it, plus any friction, on gear and oil pump rod

Drive looks like this: https://i.ebayimg.com/images/g/pH8AA...KSY/s-l300.jpg

After holder is off you can try rotating the crank back and forth with a socket wrench
The gear drive is angled and moving the crank/cam can push it up


The rod for the pump should stay in the pump, it has a clip that holds it

 

Thanks for the help Ron! That worked the engine is out and on the floor and am installing it in the new long block

 

Good work

Thanks for the update

Just as a heads up, the 4.0l OHV changed cranks in 1997, from 6 bolt holes to 8 bolt holes on rear flange
No difference as far as the engine is concerned, but the flywheel/flexplate from a 1990 to 1996 is 6 hole, and 1997-2000 is 8 hole, so they are not interchangeable

Good read here on changes to 4.0l OHV over its 10 year life: https://www.therangerstation.com/tec...0rebuild.shtml