Oil Pump

Special Tool(s)

Pressure Test
1. Attach the oil pressure gauge to an oil galley port.
2. Start the engine and observe the oil pressure gauge. If readings are less than the specification, remove the oil pump and perform the oil pump clearance test.

Clearance Test
1. Inspect the oil pump for excessive metal particles.
2. Inspect the oil pump for gouges, cracks or deep scratches.
3. Inspect the oil pump inner and outer gerotors for damage or excessive wear.





4. Using a straightedge and special tool 303-D027 (D81L-4201-A), measure the height clearance between the oil pump housing and the inner and outer gerotors. If the measurement does not meet specifications, install a new oil pump.





5. Using the special tool, measure the clearance between the outer gerotor and the oil pump housing. If the measurement does not meet specifications, install a new oil pump.