Oil Pump: Service and Repair

Oil Pump








REMOVAL
1) Set the vehicle on a lift.
2) Remove the collector cover.
3) Disconnect the ground cable from the battery.





4) Lift up the vehicle.
5) Remove the under cover.
6) Drain engine coolant.
7) Lower the vehicle.
8) Remove the radiator.
9) Remove the V-belts.
10) Remove the front chain cover.
11) Remove the timing chain.
12) Remove the crank sprocket.
13) Remove the oil pump cover.





14) Remove the inner rotor and outer rotor.

INSTALLATION
1) Apply a coat of engine oil to the whole area of inner rotor and outer rotor.





2) Install the inner rotor to the crank shaft, then assemble the outer rotor.
3) Install the oil pump cover.
4) Tighten the bolts in the numerical order as shown in the figure.

CAUTION: Make sure that the bolt is installed in correct position.








5) Install the crank sprocket.
6) Install the timing chain.
7) Install the front chain cover.
8) Install the V-belts.
9) Install the radiator.
10) Lift up the vehicle.
11) Install the under cover.
12) Lower the vehicle.
13) Fill engine coolant.

INSPECTION

TIP CLEARANCE
Measure the tip clearance of rotors. If the clearance exceeds specification, replace the rotors as a matched set.





CASE CLEARANCE
Measure the clearance between the outer rotor and rear chain cover rotor housing. If the clearance exceeds the standard value, replace the outer rotor.





SIDE CLEARANCE
Measure the clearance between oil pump inner rotor and rear chain cover. If the clearance exceeds specification, replace the rotors as a matched set.





Perform the replacement parts selection as follows. When replacing all inner rotor, outer rotor and rear chain cover with new parts
On the inner rotor, outer rotor and the rear chain cover, there are identification marks in locations shown on the figure. When replacing, use those with matching identification marks.
^ When replacing any one of the inner rotor, outer rotor and rear chain cover with new part, select suitable size from the following table so that side clearance meets the standard.





Inner rotor





Outer rotor





Rear chain cover





OIL PUMP CASE
Check the worn shaft hole, clogged oil passage, crank and other parts for faults.