Disassembly and Reassembly

OIL PUMP

COMPONENTS:

INSPECTION

1. INSPECT OIL PUMP RELIEF VALVE
a. Coat the relief valve with engine oil and drop it into the relief valve hole.
b. Check that the relief valve falls in smoothly by its own weight.
If not, replace the relief valve. If necessary, replace the oil pump assembly.
2. INSPECT OIL PUMP ROTOR SET

a. Place the drive and driven rotors into the oil pump body with the marks facing the pump body cover side.

b. Inspect the rotors for tip clearance.
1 Using a feeler gauge, measure the tip clearance between the drive and driven rotor tips.
Standard tip clearance: 0.060 to 0.180 mm (0.0024 to 0.0071 inch)
Maximum tip clearance: 0.18 mm (0.0071 inch)
If the tip clearance is greater than the maximum, replace it with a new drive and driven rotor set.

c. Inspect the rotors for side clearance.
1 Using a feeler gauge and precision straightedge, measure the side clearance between the rotor and precision straightedge.
Standard side clearance: 0.030 to 0.090 mm (0.0012 to 0.0035 inch)
Maximum side clearance: 0.090 mm (0.0035 inch)
If the side clearance is greater than the maximum, replace it with a new drive and driven rotor set.

d. Inspect the rotor for body clearance.
1 Using a feeler gauge, measure the body clearance between the oil pump body and driven rotor.
Standard body clearance: 0.250 to 0.325 mm (0.0098 to 0.0128 inch)
Maximum body clearance: 0.325 mm (0.0128 inch)
If the body clearance is greater than the maximum, replace the oil pump assembly.

REPLACEMENT
1. REPLACE OIL PUMP SEAL

HINT: There are 2 ways to remove the oil seal: remove it with the oil pump removed from the cylinder block, and remove it with the oil pump installed to the cylinder block.

a. If the oil pump is removed from the cylinder block:
1 Using a screwdriver, pry out the seal.

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

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 the lip of a new oil seal.

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

REASSEMBLY
1. INSTALL OIL PUMP ROTOR SET

a. Place the drive and driven rotors into the pump body with the marks facing the pump body cover side.

b. Install the pump body cover with the 10 screws.
Torque: 10 Nm (102 kgf-cm, 7 ft. lbs.)

2. INSTALL OIL PUMP RELIEF VALVE
a. Insert the relief valve and compression spring into the oil pump body hole.
b. Install the plug.
Torque: 49 Nm (500 kgf-cm, 36 ft. lbs.)