What is the harm of improper adjustment of automobile valve clearance?

Improper adjustment of valve clearance not only affects engine power, fuel consumption and wear, but also noise.

1, the hazard of excessive valve clearance

① The valve opening decreases, the intake and exhaust resistance increases, the air intake is insufficient, the power performance decreases, and the exhaust is not smooth.

(2) Increase the impact of the valve train on the valve train, resulting in a large abnormal sound.

③ There will be a "rebound" phenomenon, that is, the valve will jump again after it is seated.

④ There will be "jumping", that is, the rising and falling laws of the valve and the opening and closing of the valve do not meet the original design requirements, which will change the valve timing and affect the power and economy.

2. The harm of too small valve clearance will make the valve not close tightly when working, resulting in air leakage, easy to ablate the valve working face and valve seat, and will also affect the power and economy of the engine.