Prior to starting your engine, Speedmaster's Engine Oil Pump Primer Tool allows you spin the oil pump with a drill motor to increase the oil pressure and get oil to the top of your engine. This process prevents wear or damage to rotating, reciprocating, and valvetrain components. The Engine Oil Pump Primer Tool is rated at 170,000 psi and contains a billet aluminum sleeve that precisely positions the shaft to prevent wobbling. The oil pump primer tool features a billet aluminum adjustable collar and black oxide coated steel shaft. Designed to fit in your distributor hole, without modifications.