Oil Pump: Testing and Inspection

1GR-FE LUBRICATION: OIL PUMP: INSPECTION

1. INSPECT OIL PUMP RELIEF VALVE





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

If the valve does not fall smoothly, 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 timing chain cover with the matchmarks facing upward.

Text in Illustration





(b) Check the rotor tip clearance.

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





Standard tip clearance:

0.06 to 0.16 mm (0.00236 to 0.00630 in.)

Maximum tip clearance:

0.16 mm (0.00630 in.)

If the clearance is more than the maximum, replace the timing chain cover sub-assembly.

(c) Check 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 0.075 mm (0.00118 to 0.00295 in.)

Maximum side clearance:

0.075 mm (0.00295 in.)

If the clearance is more than the maximum, replace the timing chain cover sub-assembly.

(d) Check 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 clearance is more than the maximum, replace the timing chain cover sub-assembly.