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1.气门漏气的检查 将发动机发动后,卸下气门室盖,观察气门工作面周围,如有一丝丝白气冒出,说明气门漏气。另外还可以靠近空气滤清器旁侧听,如果听到有“嗤、嗤”的吹嘘声,也说明有气门漏气。 2.气缸压力检查 不打开减压阀,用手慢慢摇转曲轴,接近上止点时,若感到后半行程有强烈的反弹,说明气缸密封性好;如果只感到压缩阻力增加,但可继续转动,越接近压缩上止点,且反弹力较小,说明气缸压缩性能变差。
1. Valves leak Check the engine after the start, remove the valve cover, observe the valve around the work surface, if there is a trace of white gas emerge, the valve leak. In addition you can also close to the side of the air filter to listen, if you hear a “laugh, laugh” boo sound, but also shows a valve leak. 2. Cylinder pressure check does not open the valve, slowly crank the crankshaft, close to the top dead center, if you feel a strong second half-stroke rebound, indicating a good cylinder seal; If only to feel the compression resistance increases, but may be Continue to rotate, the closer to the compression top dead center, and the rebound force is smaller, indicating that the cylinder compression performance worsened.