Noisy Valves
NOISY VALVESPossible Causes
1. High or low oil level in crankcase.
2. Thin or diluted oil.
3. Low oil pressure.
4. Dirt in lash adjusters.
5. Worn rocker arms.
6. Worn lash adjusters
7. Worn valve guides.
8. Excessive runout of valve seats on valve faces.
Correction
1. Check for correct oil level.
2. Change oil.
3. Check engine oil level.
4. Replace rocker arm/hydraulic lash adjuster assembly.
5. Replace rocker arms.
6. Install new hydraulic lash adjuster assembly.
7. Ream and install new valves with oversize stems.
8. Grind valve seats and valves.