Causes of Valve Noise?

1 Answers
StJocelyn
07/24/25 11:21pm
Causes of valve noise: 1. Wear on the rocker arm of the valve stem end adjustment screw, resulting in excessive valve clearance, causing collision between the side-mounted valve tappet end and the adjustment screw; 2. Excessive wear on the cam, causing the tappet to jump during operation; 3. Detachment of the valve spring seat; 4. Loosening of the tappet fixing nut or uneven end face of the adjustment bolt; 5. Excessive carbon buildup in the valve guide, causing the valve to stick. Methods to check valve noise: 1. Remove the valve cover to inspect the lubrication condition of the valve rocker arm; 2. Check if the valve clearance is too large and adjust it promptly; 3. Inspect whether the hydraulic tappet is damaged or if the valve spring is broken.
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