39. Oil Pump Cleaning and Inspection

Oil Pump Cleaning and Inspection

1. Inspect the following for the excessive wear or damage:
^ The oil pump outer gear
^ The oil pump inner gear
^ The oil pump cover
^ The oil pump body




2. Measure the radial clearance between the oil pump outer gear and the oil pump body using a feeler gage.
Replace the oil pump outer gear and/or oil pump if the clearance exceeds 0.325 mm (0.01280 in).




3. Measure the side clearance between the oil pump gears and a straightedge using a feeler gage.
Replace the gears if the clearance exceeds 0.16 mm (0.0062 in).




4. Measure the tip clearance between the oil pump gear tips using a feeler gage.
Replace the gears if the clearance exceeds 0.35 mm (0.0138 in).