Oil Pump: Testing and Inspection
Oil PumpINSPECTION
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.
OIL PUMP CASE
Check the worn shaft hole, clogged oil passage, crank and other parts for faults.
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. Use the parts with the same 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.
