发动机的拉缸，一般出现在新车出厂后的走合初期和车辆大修以后的磨合试运行期间。发动机轻微的拉缸，一般不易听出响声，但可借助发动机检测仪诊断；较严重的拉缸，在发动机急速运转时，常有“嗜、喀、嗜”的略象活塞敲缸的响声，开始时声音很小，待发动机温度升高后，响声明 Engine cylinder, generally appear after the departure of the new car after leaving the factory and running over after the overhaul of the vehicle during the trial run. Engine slightly pull the cylinder, the general is not easy to hear the sound, but can be diagnosed by means of the engine detector; more serious pull cylinder, the rapid operation of the engine, often “addicted to, card, addicted to” At the beginning of the sound is very small, until the engine temperature rises, the ring statement