You're really going to want to read this thread, titled "Bob's 3.0L Engine":
http://www.4x4wire.com/forums/showthread...ge=4#Post916736

They start talking about the oil pump around page 19 or so.


89 Raider V6 manual
89 Montero 2-door Coupe "Super Legera"
91 Montero 4-door manual (Mint! Sunroof, cruise, power everything, BOUGHT FROM THE ORIGINAL OWNER!)