Disassembly/Assembly

Fig. 21 Checking Oil Pump Gear Radial Clearance. Rotor Type Similar:

Fig. 22 Checking Oil Pump Gear Side Clearance. Rotor Type Similar:

1. Remove dipstick tube from oil pump.
2. Remove gear/rotor plate screws and gear plate.
3. Remove outer and inner gears/rotors.
4. Inspect oil seal lip for damage and replace as necessary.
5. Inspect outer and inner gears/rotors, gear/rotor plate, and oil pump case for excessive wear or damage.
6. Using feeler gauge, check radial clearance between outer gear/rotor and crescent, Fig. 21. If clearance exceeds .0122 inch, replace outer gear/rotor.
7. Using straightedge and feeler gauge, measure side clearance which should not exceed .0059 inch, Fig. 22.
8. Wash, clean and dry all oil pump parts.
9. Apply light coat of engine oil to inner and outer gears/rotors, oil seal lip portion, and inside surfaces of oil pump case and plate.
10. Install outer and inner gears/rotors in pump case.
11. Install gear/rotor plate and tighten screws securely. Check that gears turn smoothly by hand.
12. Install O-ring in pump case, then dipstick tube.