Oil Pump: Service and Repair

REMOVAL AND DISASSEMBLY OF OIL PUMP

NOTE: When repairing the oil pump, the oil pan and strainer should be removed and cleaned.





1. REMOVE OIL PAN
2. REMOVE OIL STRAINER
Remove the four bolts holding the oil strainer.
3. REMOVE DRIVE BELTS
4. REMOVE CRANKSHAFT PULLEY





6. REMOVE OIL PUMP ASSEMBLY
Remove the five bolts and the oil pump assembly.





6. REMOVE OIL PUMP DRIVE SPLINE AND 0-RING





7. DISASSEMBLE OIL PUMP ASSEMBLY
(a) Unscrew the relief valve plug, and remove the spring and the relief valve piston.
(b) Remove the drive and the driven gears.


INSPECTION OF OIL PUMP




1. MEASURE BODY CLEARANCE
- Using a feeler gauge, measure the clearance between the driven gear and body.

Maximum clearance: 0.2 mm (0.008 in.)

- If the clearance is greater than the maximum, replace the gear and/or body.





2. MEASURE TIP CLEARANCE
- Using a feeler gauge, measure the clearance between both gear tips and the crescent.

Maximum clearance: 0.3 mm (0.012 in.)

- If the clearance is greater than the maximum, replace the gears and/or body.





3. MEASURE SIDE CLEARANCE
- Using a feeler gauge and a flat block, measure the side clearance as shown.

Maximum clearance: 0.15 mm (0.006 in.)

- If the clearance is greater than the maximum, replace the gears and/or body.


REPLACE FRONT OIL SEAL
1. REMOVE OIL SEAL
- Remove the oil seal with a small screwdriver.





2. INSTALL OIL SEAL
- Drive in the new oil seal with SST.
SST 09223-50010


ASSEMBLY AND INSTALLATION OF OIL PUMP
1. ASSEMBLE OIL PUMP ASSEMBLY





(a) Install relief valve piston and the spring in the body, and screw on the relief valve plug with the gasket.
(b) Insert the drive and driven gears into the pump body.





2. INSTALL OIL PUMP DRIVE SPLINE AND 0-RING
(a) Slide the pump drive spline onto the crankshaft.
(b) Place the 0-ring into the groove.





3. INSTALL OIL PUMP
- Apply the sealer to the upper bolt (a) and tighten the five bolts.

Torque:
(a) 18 ft-lb (25 N-m)
(b) 14 ft-lb (19 N-m)
(c) 9 ft-lb (13 N-m)

4. INSTALL FOLLOWING ITEMS:
(a) Clean oil strainer with four bolts.
(b) Clean oil pan and cylinder block.
(c) Crankshaft pulley.
(d) Drive belts.