Oil Pump: Testing and Inspection

2ZR-FXE LUBRICATION: OIL PUMP: INSPECTION

1. INSPECT OIL PUMP RELIEF VALVE

(a) Coat the oil pump relief valve with engine oil, then check that it falls smoothly into the valve hole by its own weight.





If this does not occur, repair or replace the oil pump assembly.

2. INSPECT OIL PUMP ROTOR

(a) Using a feeler gauge, measure the clearance between the drive and driven rotor tips.





Standard tip clearance:

0.08 to 0.16 mm (0.00315 to 0.00631 in.)

Maximum tip clearance:

0.35 mm (0.0138 in.)

If the tip clearance is greater than the maximum, replace the oil pump assembly.

(b) Using a feeler gauge and precision straightedge, measure the clearance between the 2 rotors and precision straightedge.





Standard side clearance:

0.085 to 0.135 mm (0.00335 to 0.00532 in.)

Maximum side clearance:

0.16 mm (0.00631 in.)

If the side clearance is greater than the maximum, replace the oil pump assembly.

(c) Using a feeler gauge, measure the clearance between the driven rotor and oil pump body.





Standard body clearance:

0.12 to 0.19 mm (0.00472 to 0.00750 in.)

Maximum body clearance:

0.325 mm (0.0128 in.)

If the body clearance is greater than the maximum, replace the oil pump assembly.