How to deal with valve leakage
Jul 29,2025
The sound of valve leakage is more pronounced outside the valve chamber at high loads and low speeds, and the sound increases with the increase of load. The main reason is that during the reaming of the valve seat, improper operation or excessive wear of the valve guide hole can cause the valve seat to tilt or the valve clearance to be small, resulting in valve burnout and causing the valve to close loosely and produce a leakage sound. Solution: Remove the cylinder head, grind the valve, check the elasticity of the valve spring, and readjust the valve clearance.
When adjusting the valve clearance, it is necessary to follow the manufacturer's specified value and ensure that the valve is fully closed. Adjust the position of the valve clearance: for side mounted engines, it is on the tappet, and for overhead engines, it is on the rocker arm. Common valve adjustment methods include cylinder by cylinder adjustment method, secondary adjustment method, expression method, etc. However, due to the variety of engine types, the order of the intake and exhaust valves varies. Adjusting the valve clearance using the above methods may cause inconvenience in memory and a sense of complexity. And if the ignition sequence (or fuel injection sequence) of the engine is not known, adjusting it will be more complicated.
Contact Us
Phone：
Tel：
Email:
Address：
No.40, North Industrial Road, Dawutou Village, Shenze County, Shijiazhuang City, Hebei Province
Your One Stop, One Solution!
We are a factory specialized in the production of high-quality engine valvesofmotorcycles, cars,heavy truck,construction machinery and marine.Because of professionalism, we are willing to win your trust and cooperation with superbtechnology and high-quality services!
CONTACT US
Tel：+86-13780316246
E-Mail: kbqm@china-kbqm.com
Address：No.40, North Industrial Road, Dawutou Village, Shenze County, Shijiazhuang City, Hebei Province
