Oil Pump: Testing and Inspection

Fig. 83 Exploded View Of Oil Pump:

1. Disassemble oil pump in numbered sequence, Fig. 83.
2. Inspect for distortion or damage to pump body, weak or damaged plunger and weak or broken plunger spring, replacing as necessary.
3. Check clearance between inner gear tooth tip and outer gear. Clearance should not exceed 0.0078 inch.
4. Check clearance between outer gear and pump body. Clearance should not exceed 0.0087 inch.
5. Check side clearance. Clearance should not exceed 0.0055 inch.
6. If clearances are not within limits, replace gear assembly or oil pump body.
7. Assemble oil pump in reverse numbered sequence, Fig. 83. When installing seal, apply engine oil to pump body and new seal and press in seal until it is flush with front of pump body.