Valve Train Noise Diagnosis

The following conditions may cause valve train noise:
1. Low oil pressure.
2. Loose valve rocker arm attachments.
3. Worn valve rocker arm and/or pushrod.
4. Broken valve spring.
5. Sticking valves. Inspect the valves.
6. Worn dirty or faulty valve lifters.
7. Worn or faulty camshaft. Replace the camshaft.
8. Worn valve guides. Repair as necessary.