What is the repair method for valve noise?

[SanBryce]

The repair methods for valve noise are: 1. If the noise is outside the valve chamber and is more noticeable at high load and low speed, remove the cylinder head, grind the valve, check the spring tension of the valve spring, and readjust the valve clearance; 2. If there is continuous knocking between the tail end of the valve stem and its driving component when the engine is idling, readjust the valve clearance. If the locking nut on the adjusting screw is loose, it should be tightened, and severely worn parts should be replaced; 3. If the noise is from the valve seat and the seat ring has fallen off, reinstall the valve seat according to the assembly process requirements, ensuring the upper end face is flush with the body plane, and any protruding parts should be trimmed flat.