How to Adjust evb Valve of Wei Chai Engine

Insert the feeler gauge between the exhaust valve bridge and the bracket, and adjust the brake clearance to 0.4 mm

If the valve clearance is too large, the valve opening will decrease (the lift is not enough), the intake and exhaust resistance will increase, and the air charge will decrease, thus affecting the dynamic performance. If the valve clearance is too small, the valve will not close tightly in the hot state of the valve, which will lead to air leakage in the cylinder, lower working pressure, lower power and easy ablation of the valve.

Therefore, checking the valve clearance in time to ensure the proper valve clearance is beneficial to the normal operation of the engine, reducing the abnormal impact and wear of the valve mechanism, reducing fuel consumption and prolonging the service life of the engine.

Extended data:

Precautions:

1, according to the specific requirements and regulations of automobile manufacturers for valve clearance adjustment.

2. Pay attention to the influence of temperature when adjusting: the temperature of valve rocker arm and valve stem will affect the valve clearance. Generally speaking, the valve clearance adjustment is smaller when the engine is hot than when it is cold. Some cars need to be adjusted when the engine is cold, and some cars can be adjusted both hot and cold, but the clearance value is different.

3. The valve clearance of each cylinder should be adjusted consistently to avoid unbalanced engine operation at work.

4. When adjusting the valve clearance, the adjusted valve should be completely closed, and then the adjusted clearance value is accurate.

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