Removal & Disasssembly

Support or remove engine. Remove exhaust and engine carrier. Remove oil pump cover with 4 sealing nuts. Remove gears from pump housing. Using puller, remove pump housing.

Inspection

Check pump housing for scoring. Ensure post for driven gear is tight in pump housing. Check lug of drive gear for excessive wear. Ensure machined surface of pump cover is smooth and flat.

Place gears in pump housing. Place straightedge across pump body and face of gears. Measure end play of gears to straightedge with feeler gauge. Maximum allowable clearance = 0.004 in. (0.10mm).

Reassembly & Installation

Lightly coat THICK oil pump housing gasket with sealer. Place over studs against crankcase. Carefully tap pump housing into crankcase with soft mallet. Align studs and pump housing. Avoid tearing gasket edge.

Place drive gear in pump housing and rotate until lug fits into groove on face of camshaft. Install driven gear, rotating crankshaft slightly to align gear teeth. Install dry THIN oil pump cover gasket over studs.

Place pump cover plate on studs. Tighten new sealing nuts in diagonal pattern. Sealing ring of nut faces oil pump cover. To complete installation, reverse removal procedure.

TORQUE SPECIFICATIONS