Checking the oil pump

1. Check:

• Oil pump drive gear
• Oil pump driven gear
• Oil pump housing
• Oil pump housing cover Cracks/damage/wear Replace the
  defective part(s).

2. Measure:

• Inner-rotor-to-outer-rotor-tip clearance "a"
• Outer-rotor-to-oil-pump-housing clearance "b"
• - Oil-pump-housing-to-inner-rotor-and-outerrotor clearance "c"

Out of specification Replace
the oil pump.

1. Inner rotor

2. Outer rotor

3. Oil pump housing

3. Check:

Oil pump operation Rough movement Repeat steps (1)
and (2) or replace the defective part(s).