Oil Pump: Service and Repair

COMPONENT

REMOVAL





1. Disconnect the ground cable from battery.
2. Lift-up the vehicle.
3. Remove the under cover.
4. Lower the vehicle.
5. Remove the radiator.
6. Remove the V-belts.





7. Remove the belt tensioner.
8. Remove the crankshaft position sensor.





9. Remove the crank pulley using ST.
ST 499977100 CRANK PULLEY WRENCH
10. Remove the water pump.





11. Remove the timing belt guide. (MT model)





12. Remove the crank sprocket.





13. Remove the bolts which install oil pump onto cylinder block.

NOTE: When disassembling and checking the oil pump, loosen the relief valve plug before removing the oil pump.





14. Remove the oil pump by using flat tip screwdriver.

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

INSTALLATION
Install in the reverse order of removal.
Perform the following.
1. Apply liquid gasket to the matching surfaces of oil pump.
Liquid gasket: THREE BOND 1215 (Part No. 004403007) or equivalent





2. Replace the O-ring (A) with a new one.





3. Apply a coat of engine oil to the inside of oil seal.
4. 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.
^ Be careful not to scratch oil seal when installing oil pump on cylinder block.

5. Install the oil pump.





6. Apply a coat of liquid gasket to the 3 bolts of oil pump.

DISASSEMBLY





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

CAUTION: Before disassembling the oil pump, remove the relief valve.

ASSEMBLY





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

NOTE: Use a new oil seal.

2. Apply a coat of engine oil to the inner and outer rotors.
3. Install the inner and outer rotors in their original positions.
4. Install the oil relief valve and relief valve spring and plug.

NOTE: Use a new gasket.





5. Install the oil pump cover.

INSPECTION
TIP CLEARANCE





Measure the tip clearance of rotors. If the clearance is out of the standard value, replace the rotors as a matched set.

CASE CLEARANCE





Measure the clearance between the outer rotor and oil pump rotor housing. If the clearance is out of the standard value, replace the oil pump case.

SIDE CLEARANCE





Measure the clearance between oil pump inner rotor and pump cover. If the clearance is out of the standard value, replace the rotor or oil pump case.

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 72.8 mm (2.866 inch)
Installed length 54.7 mm (2.154 inch)
Load when installed 81.3 N (8.29 kgf, 18.24 lbs.)

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

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