Oil Pump: Testing and Inspection

3MZ-FE LUBRICATION: OIL PUMP:

INSPECTION

1. INSPECT OIL PUMP RELIEF VALVE
(a) Apply a light coat of engine oil.






(b) Check that it falls smoothly into the valve hole by its own weight.
2. INSPECT OIL PUMP ASSEMBLY
(a) Inspect the oil pump rotor set.
(1) Apply a light coat of engine oil to the oil pump rotor set and place it into the oil pump body. Check that the rotors revolve smoothly.






(b) Inspect rotor tip clearance.
(1) Using a feeler gauge, measure the clearance between the drive and the driven rotor tips.
Standard tip clearance:
0.060 to 0.180 mm (0.0024 to 0.0071 in.)
Maximum tip clearance:
0.35 mm (0.0138 in.)






(c) Inspect rotor body clearance.
(1) Using a feeler gauge, measure the clearance between the driven rotor and body.
Standard body clearance:
0.250 to 0.325 mm (0.0098 to 0.0128 in.)
Maximum body clearance:
0.30 mm (0.0118 in.)






(d) Inspect rotor side clearance.
(1) Using a feeler gauge and precision straight edge, measure the clearance between the rotors and precision straight edge.
Standard side clearance:
0.03 to 0.09 mm (0.0012 to 0.0035 in.)
Maximum side clearance:
0.15 mm (0.0059 in.)