Oil Pump: Testing and Inspection

2UZ-FE LUBRICATION: OIL PUMP:

INSPECTION

1. INSPECT OIL PUMP RELIEF VALVE





(a) Coat the relief valve with engine oil and drop it into the relief valve hole.
(b) Check that the relief valve falls in smoothly by its own weight.
If it does not, replace the relief valve. If necessary, replace the oil pump assembly.
2. INSPECT OIL PUMP ROTOR SET





(a) Place the drive and driven rotors into the pump body with the marks facing the pump body cover side.





(b) Inspect the rotor 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 (0.00236 to 0.00709 in.)
Maximum tip clearance:
0.18 mm (0.00709 in.)
If the tip clearance is greater than the maximum, replace the rotors as a set.





(c) Inspect the rotor side clearance.
(1) Using a feeler gauge and precision straightedge, measure the clearance between the rotors and precision straightedge.
Standard side clearance:
0.030 to 0.090 mm (0.00118 to 0.00354 in.)
Maximum side clearance:
0.09 mm (0.00354 in.)
If the side clearance is greater than the maximum, replace the rotors as a set. If necessary, replace the oil pump assembly.





(d) Inspect the 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 (0.00984 to 0.0128 in.)
Maximum body clearance:
0.325 mm (0.0128 in.)
If the body clearance is greater than the maximum, replace the rotors as a set. If necessary, replace the oil pump assembly.