Oil Pump: Testing and Inspection

1NZ-FXE LUBRICATION: OIL PUMP: INSPECTION

INSPECTION





1. INSPECT OIL PUMP RELIEF VALVE
(a) Apply engine oil to the oil pump relief valve. Check that the valve falls smoothly into the valve hole of the oil pump body by its own weight.
2. INSTALL OIL PUMP ASSEMBLY
(a) Check the operation.
(1) Apply engine oil to the drive and driven rotors. Install the rotors to the oil pump body, then check that the rotors revolve smoothly.





(b) Inspect the tip clearance.
(1) Using a feeler gauge, measure the clearance between the drive and driven rotor tips.
Standard tip clearance:
0.060 to 0.180 mm (0.0024 to 0.0071 in.)
Maximum tip clearance:
0.28 mm (0.0110 in.)
If the tip clearance is greater than the maximum, replace the oil pump assembly.





(c) Inspect the body clearance.
(1) Using a feeler gauge, measure the clearance between the driven rotor and oil pump body.
Standard body clearance:
0.250 to 0.325 mm (0.0098 to 0.0128 in.)
Maximum body clearance:
0.425 mm (0.0167 in.)
If the body clearance is greater than the maximum, replace the oil pump assembly.