Disassembly and Assembly

DISASSEMBLY
1. To remove the relief valve, proceed as follows:

Figure 98:

a. Remove the threaded plug and gasket from the oil pump.

Figure 97:

b. Remove spring and relief valve.
2. Remove oil pump cover screws, and lift off cover.
3. Remove pump rotors.
4. Wash all parts in a suitable solvent and inspect carefully for damage or wear.

ASSEMBLY
1. Assemble pump, using new parts as required. Install the inner rotor with chamfer facing the cast iron oil pump cover.
2. Prime oil pump before installation by filling rotor cavity with engine oil.
3. Install cover and tighten screws to 12 Nm (105 inch lbs.).

Figure 97:

CAUTION: Oil pump pressure relief valve must be installed as shown, or serious damage may occur.

4. Install relief valve, spring, gasket and cap as shown. Tighten cap to 41 Nm (30 ft. lbs.).