Valve Train Noise Diagnosis

- Low oil pressure. Repair as necessary. Refer to Low Oil Pressure.

- Loose rocker arm attachments. Inspect and repair as necessary.

- Worn rocker arm and/or pushrod.

- Broken valve spring.

- Sticking valves.

- Lifters worn, dirty, or defective. Clean, inspect, test and replace as necessary.

- Camshaft worn, or poor machining. Replace camshaft.

- Worn valve guides.