Oil Pump: Service and Repair

DISASSEMBLY
1. Remove the timing belt.
2. Remove all the oil pan bolts.
3. Remove the oil pan.
4. Remove the oil screen.





5. Remove the front case assembly.
6. Remove the oil pump cover.
7. Remove the inner and outer gears from the front case. The matching marks on the inner and outer gears indicate the direction of installation.
8. Remove all the oil pan bolts.

INSPECTION
FRONT CASE
1. Check the front case for cracks or damage. Replace as necessary.
2. Check the front oil seal for worn or damaged lips. Replace if defective.

OIL PAN AND OIL SCREEN
1. Check the oil pan for failure, damage or cracks. Replace if defective.
2. Check the oil screen for failure, damage and cracks and replace if defective.

FRONT CASE AND OIL PUMP COVER
Check the surfaces contacting the gears for damage or wear.





OIL PUMP GEARS
1. Check the gear tooth surfaces for wear or damage.





2. Measure the clearance between outer gear and front case.
Body clearance: 0.12 - 0.185 mm (0.0047 - 0.0073 inch)





Tip clearance: 0.025 - 0.069 mm (0.0010 - 0.0027 inch)





Side clearance Outer gear: 0.04 - 0.09 mm (0.0016 - 0.0035 inch)
Inner gear: 0.04 - 0.085 mm (0.0016 - 0.0033 inch)
3. Check the tip clearance on the pump rooter.

RELIEF VALVE AND SPRING
1. Check sliding condition of the relief valve inserted in the front case.
2. Inspect for distorted or broken relief valve spring.
Standard value
Free height: 46.6 mm (1.8346 inch)
Load: 6.1 kg/40.1 mm (13.42 lb/1.578 inch)

OIL PRESSURE SWITCH





1. Use an ohmmeter to check the continuity between the terminal and the body. If there is no continuity, replace the oil pressure switch.





2. Check the continuity between the terminal and the body when the fine wire is pushed. If there is continuity even when the fine wire is pushed, replace the switch.
3. If there is no continuity when a 50 kPa (7 psi) vacuum is applied through the oil hole, the switch is operating properly.
Check for air leaks. If air does leak, the diaphragm is broken. Replace the switch.

REASSEMBLY
OIL PUMP
1. Install the outer and inner gears into the front case. Make sure that the inner and outer gears are installed in the same direction as shown.
2. Install the oil pump cover and tighten the bolts to the specified torque. After the bolts have been tightened, check to ensure that the gear turns smoothly.
Tightening torque
Oil pump cover bolt: 8 - 12 Nm (80 - 120 kg.cm, 6 - 9 ft. lbs.)





3. Install the relief valve and spring. Tighten the plug to the specified torque. Apply engine oil to the relief valve.
Relief valve plug 40 - 50 Nm (400 - 500 kg.cm, 30 - 37 ft. lbs.)

FRONT CASE





1. Install the front case assembly with a new gasket, and tighten the bolts to the specified torque.
Tightening torque: 20 - 27 Nm (200 - 270 kg.cm, 15 - 20 ft. lbs.)
Length
A 30 mm (1.18 inch)
B 45 mm (1.77 inch)
C 60 mm (2.36 inch)
D 22 mm (0.89 inch)

OIL SEAL





1. Using the special tool, Crankshaft oil seal guide (09214-21100), install the oil seal.





2. Using the special tool, Crankshaft front oil seal installer (09214-21000), install the oil seal.
3. Install the oil screen.
4. Clean both gasket surfaces of the oil pan and the cylinder block.





5. Apply sealant into the groove of the oil pan flange as shown.

CAUTION:
^ Apply sealant approximately 4 mm (0.16 inch) in thickness
^ After application of sealant, do not exceed 15 minutes before Installing the oil pan.

6. Install the oil pan and tighten the bolts to the specified torque.
Tightening torque
Oil pan bolt: 10 - 12 Nm (100 - 120 kg.cm, 7 - 9 ft. lbs.)