For 1990-2009 cars

### Cleaning Procedure

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

Caution: Refer to Safety Glasses Caution in the Preface section.

2. Dry the oil pump components with compressed air.

### Inspection Procedure

Important: There are no serviceable components within the oil pump. Disassemble the pump only to diagnose an oiling concern. A disassembled oil pump must not be reused. A disassembled oil pump must be replaced.

1. Inspect the oil pump housing for damage.
2. Inspect the oil pump cover (1) for damage.
3. Inspect the inner drive gear (1) for damage. If inner diameter damage is found, ensure the crankshaft is also inspected.
4. Inspect the outer driven gear (1) for damage.
5. Inspect the oil pump relief valve components (1) for debris or damage.
6. Inspect the primary camshaft drive chain lower guide (1) for damage. If replacement of the primary camshaft drive chain lower guide (1) is necessary, replace the entire oil pump assembly. The primary camshaft drive chain lower guide (1) is not serviceable separately.
7. If debris or damage is present within the oil pump, further inspection of all of the engine components is necessary.