Valve Train Noise Diagnosis

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