What to Do About Car Valve Noise?

[Holden]

Here are methods to avoid car valve noise: 1. Replace the engine oil with the quality grade and viscosity specification as specified in the owner's maintenance manual. 2. Change the engine oil promptly according to the maintenance cycle and oil performance specified in the owner's maintenance manual. 3. Regularly check the engine oil level during the maintenance interval. The following are possible causes of car valve noise: 1. Wear and groove formation or flange breakage on the valve spring seat. 2. Excessive or inconsistent valve lash. 3. Wear and misalignment of the valve adjusting screw, or loosening of the lock nut. 4. Caused by the gap between the hydraulic valve lifter and the cam (or valve seat). The gap is mostly due to excessive wear of the hydraulic lifter, causing rapid oil pressure loss inside the lifter. 5. Too high or too low oil level in the crankcase. 6. Wear of the valve guide. 7. Dirty lifter. 8. Out-of-round valve seat or valve cone surface.