一台朝柴6102货车发动机,接近大修行驶里程,以动力不足为由,提前进厂修理。对发动机进行搪缸、更换全部活塞和气门等零件。竣工出厂后一个月左右,该车依然动力不足,发动机温度高。进厂返修,对冷却系、供油系检查没有发现问题,只是油底壳机油中渗有少量柴油。对发动机解体检查,发现个别活塞已经出现烧顶现象,特别是第3缸活塞严重烧蚀,活塞环卡死 One toward Chai 6102 truck engine, approaching overhaul mileage, power shortage reason, advance into the factory repair. Burn the engine, replace all the pistons and valves and other parts. About a month after the completion of the factory, the car is still lack of motivation, the engine temperature is high. Into the factory repair, the cooling system, fuel supply inspection found no problem, but a small amount of diesel oil in the oil pan seepage. On the engine disintegration inspection and found that some individual piston has been burning top phenomenon, especially the serious ablation of the 3rd cylinder piston, piston ring stuck