发动机工作中,如果气门漏气,则一般表现为气缸压缩力不足,燃烧不良,排气有规律地冒黑烟或白烟,发动机耗油率增加,功率降低。如果同时还结合伴有进气支管过热,中央吸气管口有漏气声,甚至空气滤清器有反流窜气现象,则说明进气门漏气;如工作不长时间排气支管温度就很高,并且排气有“噗哧、 Engine work, if the valve leaks, the general performance of the cylinder compression force is insufficient, poor combustion, regularly exhaust black smoke or white smoke, the engine fuel consumption increased, reducing power. If at the same time also accompanied by the intake manifold overheating, the central suction nozzle leak sound, and even the air filter has the phenomenon of reflux blow-by gas, then the intake valve leaks; such as the work of the exhaust branch pipe temperature is not long High, and the exhaust has ”Puchi,