For 1990-2009 cars

### Cleaning Procedure

1. Clean the oil pump components with non-corrosive solvent.

Warning: Refer to Safety Glasses and Compressed Air Warning in the Preface section.

2. Dry the oil pump components with compressed air.

### Visual Inspection

1. Inspect the oil pump housing for the following:

• | Damage, scoring, or debris on the housing surface for the drive gear (1)

• | Damage, scoring, or debris in the oil pump relief valve bore (2)

• | Damage to the oil pump housing mounting points (3)

• | Damage to the threads in the oil pump housing for the oil pump cover bolts (4)

• | Damage, scoring, or debris on the housing surface (5)

• | Damage, scoring, or debris in the oil pump output port (6)

2. Inspect the oil pump for the following conditions:

• | Damage to the oil pump cover mounting points (1)

• | Damage to the oil pump oil pump drive shaft gear (2)

• | Damage to the sealing surface between the oil pump and the oil pump housing (3)

• | Damage to the oil pump outer rotor (4)

• | Damage to the oil pump inner rotor (5)