Disassembly and Assembly

DISASSEMBLY
1. To remove the relief valve, proceed as follows:
2. Remove cotter pin. Drill a 3.175 mm (1/8 inch) hole into the relief valve retainer cap and insert a self-threading sheet metal screw into cap.





3. Clamp screw into a vise and while supporting oil pump body, remove cap by tapping oil pump body using a soft hammer. Discard retainer cap and remove spring and relief valve (Fig. 110).
4. Remove oil pump cover screws, and lift off cover.
5. Remove pump rotors.





6. Wash all parts in a suitable solvent and inspect carefully for damage or wear (Fig. 111).

ASSEMBLY
1. Assemble oil pump using new parts as required.
2. Tighten cover screws to 12 Nm (105 in. lbs.) (Fig. 111).
3. Prime oil pump before installation by filling rotor cavity with engine oil.
4. If oil pressure is low and pump is within specifications, inspect for worn engine bearings or other reasons for oil pressure loss.