观察柴油机进排气状态,是了解其工况的重要手段。因而,不管是维修前或修完后,如在暂时不安装进排气管的状态下进行试车,就可更直观地判定故障特别是对于共用一条进排气管道的多缸机,拆除进排气歧管后试车观察,更能显示其方便性。 1.观察进气管口 柴油机运转中小应有任何排烟、喷火现象。如有,就表明存在气门与气门座配合不严、气门间隙偏小或配气正时错 Observe diesel engine intake and exhaust state, is an important means of understanding its working conditions. Therefore, whether before repair or after repair, such as temporarily installed in the exhaust pipe to test the state, you can more intuitively determine the fault, especially for the common use of a multi-cylinder into the exhaust pipe, remove the row Gas manifold test drive after the test, more to show its convenience. 1. Observe the intake pipe diesel engine running small should have any smoke, fire phenomenon. If so, it shows the presence of valve and seat with lax valve clearance is too small or wrong timing valve