Disassembly and Assembly
DISASSEMBLY1. 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 2 bolts, pump body covering, 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 rotors for body clearance.
Using a feeler gauge, measure the clearance between the driven rotor and body.
Standard body clearance: 0.10 - 0.16 mm (0.0039 - 0.0063 inch)
Maximum body clearance: 0.20 mm (0.0079 inch)
If the body clearance is greater than maximum, replace the rotors as a set. If necessary, replace the oil pump assembly.
3. Inspect rotors for tip clearance.
Using a feeler gauge, measure the clearance between the drive and driven rotor tips.
Standard tip clearance: 0.04 - 0.16 mm (0.0016 - 0.0063 inch)
Maximum tip clearance: 0.20 mm (0.0079 inch)
If the tip clearance is greater than maximum, replace the rotors as a set.
REPLACEMENT
1. Remove oil seal.
Using a screwdriver, pry out the oil seal.
2. Install oil seal.
a. Using Special Service Tool (SST) 09950 - 60010 (09951 - 00350), 09950 - 70010 (09951 - 07100) or equivalent, and a hammer, tap in a new oil seal until its face is flush with the oil pump cover edge.
b. Apply MP grease to the oil seal lip.
Crankshaft Front Oil Seal
REASSEMBLY
1. Install drive and driven rotors.
a. Place the drive and driven rotors into pump body with the mark on the driven rotor facing the pump body side.
b. Install a new O-ring to the oil pump body.
c. Install the oil pump body cover with the 2 bolts.
Torque: 8.8 Nm (78 inch 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.