Oil Pump: Service and Repair

REMOVAL





1. Remove the oil pressure switch, using 24 mm deep socket.

NOTE: Since a sealant is used on the threaded area, be careful not to damage the oil pressure switch.

2. Remove the oil filter and the oil pan.
3. Remove the oil screen and gasket.
4. Remove the three bracket securing bolts and remove the oil filter bracket and gasket.
5. Remove the oil relief valve plug from the oil pump case.
6. Remove the oil pump case.

INSPECTION
Oil Pump
1. Visually check the parts of the oil pump case for cracks and damage.








2. Assemble the rotor on the oil pump and then check the clearance with a thickness gauge.
Oil pump side clearance:
Standard value:
Body clearance: 0.100-0.181 mm (0.0039-0.0071 inch)
Side clearance: 0.040-0.095 mm (0.0016-0.0037 inch)

Relief Plunger and Spring
1. Check the relief plunger for smooth operation.
2. Check the relief spring for a deformed or broken condition.

Oil Filter Bracket
1. Make sure that there is no damage on the oil filter installation surface.
2. Check the oil filter bracket for oil leaks or cracks.

Oil Pressure Switch





1. Check the continuity between the terminal and the body with an ohmmeter.
If there is continuity, replace the oil pressure switch.





2. Check the continuity between the terminal and the body when the fine wedge is pushed. If there is continuity even when the fine wedge is pushed, replace it.
3. Or, if there is no continuity when a 50 kPa (7 psi) pressure is applied through the oil hole, the switch is operating properly. Check that air doesn't leak. If air leaks, the diaphragm is broken, and replace it.

INSTALLATION





1. Install the oil pump case with the gasket.
Tightening torque:
Oil pump case bolt: 12-15 Nm (120-150 kg.cm, 9-10 ft. lbs.)
Oil pump cover screw: 8-12 Nm (80-120 kg.cm, 5.8-8.6 ft. lbs.)





2. Install the oil seal into the oil pump case as far as possible, using special tool (09214-33000).





3. Install the relief plunger and spring, and tighten the oil relief valve plug to the specified torque.
Tightening torque:
Oil relief valve plug: 40-50 Nm (400-500 kg.cm, 29-36 ft. lbs.)
4. Install the oil screen and a new gasket.
Tightening torque:
Oil screen bolt: 15-22 Nm (150-220 kg.cm, 11-15 ft. lbs.)
5. Clean the gasket surfaces of the cylinder block and the oil pan.





6. Apply sealant into the groove of the oil pan flange.

NOTE:
1. Make the first cut from the end of the nozzle furnished with the sealant approximately 4 mm. After application of the sealant, do not exceed 15 minutes before installing the oil pan.
2. Do not allow the sealant into the range A shown in the illustration on the oil pan flange.





7. Install the oil pan and tighten the bolts to the specified torque. Tighten the oil pan bolt as shown in figure.
Tightening torque:
Oil pan bolt:
*19-28 Nm (190-280 kg.cm, 1.375-2.027 ft. lbs.)
**5-7 Nm (50-70 kg.cm, 3.7-5.0 ft. lbs.)
***30-42 Nm (300-420 kg.cm, 2.17-3.040 ft. lbs.)





8. Using 24 mm deep socket, install the oil pressure switch after applying sealant to the threaded area.
Sealant: Threebond 1104 or equivalent

NOTE: Do not over torque the oil pressure switch.
Tightening torque:
Oil pressure switch: 8-12 Nm (80-120 kg.cm, 5.8-8.6 ft. lbs.)