Oil Pump: Testing and Inspection

2GR-FXE LUBRICATION: OIL PUMP: INSPECTION

1. INSPECT OIL PUMP RELIEF VALVE

(a) Coat the relief valve with engine oil and 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 timing chain cover sub-assembly.

2. INSPECT OIL PUMP ROTOR SET

(a) Install the rotors to the timing chain cover with the marks of the rotors facing up. Check that the rotors rotate smoothly.





Text in Illustration





(b) If the rotors are stuck or do not move smoothly, replace the timing chain cover sub-assembly Removal.

(c) Check the tip clearance.





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

Standard tip clearance:

0.060 to 0.160 mm (0.00236 to 0.00630 in.)

Maximum tip clearance:

0.160 mm (0.00630 in.)

If the tip clearance is more than the maximum, replace the oil pump rotor set.

(d) Check the side clearance.





(1) Using a feeler gauge and precision straightedge, measure the clearance between the rotors and precision straightedge as shown in the illustration.

Standard side clearance:

0.030 to 0.090 mm (0.00118 to 0.00354 in.)

Maximum side clearance:

0.090 mm (0.00354 in.)

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

(e) Check the body clearance.





(1) Using a feeler gauge, measure the clearance between the timing chain cover and driven rotor as shown in the illustration.

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