Oil Pump: Service and Repair

REMOVAL





1. Disconnect battery ground cable.
2. Lift-up the vehicle.





3. Remove under cover.
4. Drain coolant.
5. Lower the vehicle.
6. Remove radiator.
7. Remove V-belt.
8. Remove front chain cover.
9. Remove timing chain.





10. Remove oil pump cover and crankshaft sprocket.
11. Remove inner rotor and outer rotor.

INSTALLATION





1. Apply engine oil to the entire surface area of both inner and outer rotor.
2. Install the inner rotor by fitting it into the groove on the crankshaft, and then assemble the outer rotor.
3. Install oil pump cover.





4. Tighten the bolts in the numerical sequence shown in the figure.

CAUTION: Make sure that bolt mounting position is correct.

Tightening torque: 6.4 Nm (0.65 kgf-m, 4.7 ft. lbs.)
5. Install crank sprocket.
6. Install timing chain.
7. Install front chain cover.
8. Install V-belt
9 Remove timing chain assembly.
10. Fill coolant.

INSPECTION
1. TIP CLEARANCE





Measure the tip clearance of rotors. If the clearance exceeds the limit, replace rotors as a matched set.
Tip clearance:
Standard 0.04 - 0.14 mm (0.00 16 - 0.0055 inch)
Limit 0.18 mm (0.0071 inch)
2. CASE CLEARANCE





Measure the clearance between the outer rotor and the rear chain cover rotor housing. If the clearance exceeds the limit, replace the rotor.
Case clearance:
Standard 0.10 - 0.18 mm (0.0039 - 0.0071 inch)
Limit 0.25 mm (0.0098 inch)
3. SIDE CLEARANCE





Measure clearance between oil pump inner rotor and rear chain cover. If the clearance exceeds the limit, replace rotor or pump body.
Side clearance:
Standard 0.02 - 0.07 mm (0.0008 - 0.0028 inch)
Limit 0.15 mm (0.0059 inch)
4. OIL PUMP CASE
Check the oil pump case for worn shaft hole, clogged oil passage, cracks and other faults.