Oil Pump: Service and Repair

A: REMOVAL





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





3. Remove under cover.





4. Drain coolant.





5. Remove bolts which install water pipe of oil cooler to oil pump. (AT vehicles only)





6. Remove water pipe and hoses between oil cooler and water pump. (AT vehicles only)





7. Remove radiator.
8. Lower the vehicle.





9. Remove crankshaft position sensor.





10. Remove camshaft position sensor.





11. Remove V-belts.





12. Remove rear side V-belt tensioner.





13. Remove crankshaft pulley using ST
ST 49997700 CRANKSHAFT PULLEY WRENCH





14. Remove water pump.




15. Remove timing belt guide. (MT vehicles only)





16. Remove crankshaft sprocket.





17. Remove bolts which install oil pump onto cylinder block.





18. Remove oil pump using flat bladed screwdriver.

CAUTION: Be careful not to scratch mating surfaces of cylinder block and oil pump.


B: DISASSEMBLY





Remove screws which secure oil pump cover and disassemble oil pump. Inscribe alignment marks on inner and outer rotors so that they can be replaced in their original positions during reassembly.

CAUTION: Before removing relief valve, loosen plug when removing oil pump from cylinder block.


C: 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 (0.0016 - 0.0055 inch)
Limit 0.18 mm (0.0071 inch)

2. CASE CLEARANCE





Measure the clearance between the outer rotor and the cylinder block rotor housing. If the clearance exceeds the limit, replace the rotor.
Case clearance:
Standard 0. 10 - 0. 175 mm (0. 0039 - 0.0069 inch)
Limit 0.20 mm (0.0079 inch)

3. SIDE CLEARANCE





Measure clearance between oil pump inner rotor pump 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 RELIEF VALVE
Check the valve for fitting condition and damage, and the relief valve spring for damage and deterioration. Replace the parts if defective.
Relief valve spring:
Free length: 71.8 mm (2.827 inch)
Installed length: 54.7 mm (2.154 inch)
Load when installed: 77.08 N (7.86 kg, 17.33 lb)

5. OIL PUMP CASE
Check the oil pump case for worn shaft hole, clogged oil passage, worn rotor chamber, cracks, and other faults.

6. OIL SEAL
Check the oil seal lips for deformation, hardening, wear, etc. and replace if defective.


D: ASSEMBLY





1. Install front oil seal using ST.
ST 499587100 OIL SEAL INSTALLER

CAUTION: Use a new oil seal.

2. Install inner and outer rotors in their original positions.
3. Install oil relief valve and relief spring.





4. Install oil pump cover.
Tightening torque:
T1: 5 - 6 Nm (0.5 - 0.6 kg-m, 3.6 - 4.3 ft. lbs.)
T2: 40.7 - 47.6 Nm (4.15 - 4.85 kg-m, 30.0 - 35.1 ft. lbs.)


E: INSTALLATION
Installation is in the reverse order of removal. Observe the following:





1. Apply fluid packing to matching surfaces of oil pump.
Fluid packing: THREE BOND 1215 or equivalent
2. Replace O-ring with a new one.





3. Apply a coat of engine oil to the inside of the oil seal.
4. Be careful not to scratch oil seal when installing oil pump on cylinder block.
5. Position the oil pump, aligning the notched area with the crankshaft, and push the oil pump straight.

CAUTION: Make sure the oil seal lip is not folded.





6. Install oil pump.
Tightening torque: T: 6.4 Nm (0.65 kg-m, 4.7 ft. lbs.)