Oil Pump: Testing and Inspection
INSPECTION1. TIP CLEARANCE
Measure the tip clearance of rotors. If the clearance exceeds the limit, replace rotors as a matched set.
Tip clearance:
Standard 0.04 - 0.14 mm (0.0016 - 0.0055 inch)
Limit 0.20 mm (0.0079 inch)
2. CASE CLEARANCE
Measure the clearance between the outer rotor and the rear chain cover rotor housing. If the clearance exceeds the limit, replace the rotor.
Case clearance:
Standard 0.11 - 0.18 mm (0.0043 - 0.0071 inch)
Limit 0.25 mm (0.0098 inch)
3. SIDE CLEARANCE
Measure clearance between oil pump inner rotor and rear chain cover. If the clearance exceeds the limit, replace rotor or pump body.
Side clearance:
Standard 0.02 - 0.08 mm (0.0008 - 0.0031 inch)
Limit 0.15 mm (0.0059 inch)
4. OIL PUMP CASE
Check the oil pump case for worn shaft hole, clogged oil passage, cracks and other faults.