Oil Pump Assembly Overhaul

OIL PUMP

















DISASSEMBLY





1. REMOVE RELIEF VALVE
a. Using snap ring pliers, remove the snap ring.
b. Remove the retainer, spring and relief valve.





2. REMOVE DRIVE AND DRIVEN ROTORS
Remove the 10 screws, pump body cover, the drive and driven rotors.

INSPECTION





1. INSPECT RELIEF VALVE
Coat the valve with engine oil and check that it falls smoothly into the valve hole by its own weight.
If it doesn't, replace the relief valve. If necessary, replace the oil pump assembly.





2. INSPECT DRIVE AND DRIVEN ROTORS INTO OIL PUMP BODY
Place the drive and driven rotors into the oil pump body with the mark facing upward.





3. INSPECT ROTORS FOR TIP CLEARANCE
Using a feeler gauge, measure the clearance between the drive and driven rotor tips.





Tip clearance:

If the tip clearance is greater than maximum, replace the rotors as a set.





4. INSPECT ROTORS FOR SIDE CLEARANCE
Using a feeler gauge and precision straight edge, measure the clearance between the rotors and precision straight edge.





Side clearance:

If the side clearance is greater than maximum, replace the rotors as a set. If necessary, replace the oil pump assembly.





5. INSPECT ROTOR FOR BODY CLEARANCE
Using a feeler gauge, measure the clearance between the driven rotor and body.





Body clearance:

If the body clearance is greater than maximum, replace the rotors as a set. If necessary, replace the oil pump assembly.
6. REMOVE DRIVE AND DRIVE ROTORS

REPLACEMENT
REPLACE CRANKSHAFT FRONT OIL SEAL

HINT: There are 2 methods (a and b) to replace the oil seal.

a. If the oil pump is removed from the cylinder block:





1. Using a screwdriver, pry out the oil seal.





2. Using SST and a hammer, tap in a new oil seal until its surface is flush with the oil pump body edge.
SST 09316-60011 (09316-00011)
3. Apply MP grease to the oil seal lip.
b. If the oil pump is installed to the cylinder block:





1. Using a knife, cut off the oil seal lip.
2. Using a screwdriver, pry out the oil seal.

NOTICE: Be careful not to damage the crankshaft. Tape the screwdriver tip.

3. Apply MP grease to a new oil seal lip.





4. Using SST and a hammer, tap in the oil seal until its surface is flush with the oil pump body edge.
SST 09316-60011 (09316-00011)

REASSEMBLY





1. INSTALL DRIVE AND DRIVEN ROTORS
a. Place the drive and driven rotors into pump body with the marks facing the pump body cover side.





b. Install the pump body cover with the 10 screws.
Torque: 10 Nm (105 kgf-cm, 7 ft. lbs.)





2. INSTALL RELIEF VALVE
a. Insert the relief valve, spring and retainer into the oil pump body hole.
b. Using snap ring pliers, install the snap ring.