Oil Pump Inspection

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, replace the oil pump.

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

Standard tip clearance:

0.08 to 0.160 mm (0.00315 to 0.00630 in.)

Maximum tip clearance:

0.35 mm (0.0138 in.)

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

Standard side clearance:

0.03 to 0.08 mm (0.00118 to 0.00315 in.)

Maximum side clearance:

0.16 mm (0.00630 in.)

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

Standard body clearance:

0.12 to 0.19 mm (0.0047 to 0.0075 in.)

Maximum body clearance:

0.325 mm (0.0128 in.)