Oil Pump: Service and Repair

DISASSEMBLY





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.

RELIEF PLUNGER AND SPRING
1. Check the relief plunger for smooth operation.
2. Check the relief spring for the 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 by between terminal and 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 (0.5 kgf/cm2, 7 psi) vacuum 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.

REASSEMBLY





1. Install the oil pump case with the gasket.





2. Install the oil seal in the oil pump case, using special tool (09214-33000).





3. Install the relief plunger and spring, and tighten the oil relief valve plug to the specified torque.





4. Install the oil screen with a new gasket.
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: 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.





7. Install the upper oil pan and tighten the bolts to the specified torque. Tighten the oil pan bolts.





8. Install the lower oil pan and tighten the bolts to specified torque.





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

NOTE: Do not tighten the oil pressure switch to the excessive torque.