Oil Pump: Service and Repair

OIL PUMP AND OIL PAN






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 deformation or break.

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 leak or cracks.

Oil Pressure Switch





1. Check the continuity between the terminal and the body with an ohmmeter.
If there is no 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 (70 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.

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 to the groove of the oil pan flange.





NOTE:
1 Make the first cut from the end of the nozzle furnished with the sealant approx. 4 mm. After application of the sealant, do not exceed 15 minutes before installing the oil pan.
2 Do not apply the sealant to 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.
Tightening torque
Oil pan bolt
* 19 - 28 Nm (190 - 280 kg-cm, 13.75 - 20.27 ft. lbs.)
** 5 - 7 Nm (50 - 70 kg-cm, 3.7 - 5.0 ft. lbs.)
*** 30 - 42 Nm (300 - 420 kg-cm, 21.70 - 30.40 ft. lbs.)

Oil Pan Tightening Sequence:

8. Tighten the oil pan bolt as shown in figure.





9. 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 torque the oil pressure switch too much.

Tightening torque
Oil pressure switch 8 - 12 Nm (80 - 120 kg-cm, 5.8 - 8.6 ft. lbs.)