Oil Pump: Testing and Inspection

TOOTH TIP CLEARANCE





Use a feeler gauge to measure the inner gear tip to outer gear tip clearance. The clearance should be 0.05-0.18 mm (0.002-0.007 inch).

OUTER ROTOR-TO-PUMP BODY CLEARANCE





^ Inspect the oil pump body for scoring in the outer gear bore. Disregard light scoring.
^ Measure the body (housing) to outer gear clearance with a feeler gauge. The outer race-to-housing clearance should be 0.074-0.161 mm (0.0029-0.0063 inch).

INNER AND OUTER ROTOR SIDE CLEARANCE





^ Use a feeler gauge and Straight Edge D83L-4201-C or equivalent, to measure the rotor side clearance. The clearance should be 0.013-0.089 mm (0.0005-0.0035 inch).
^ If the above clearance is out of limits, replace the oil pump (6600).
^ Clean the relief valve and check for scores, burrs, or sticking. Replace the oil pump as necessary.