我部一台轿车的发动机几次冲坏气缸垫,水箱内经常渗入油污;排气管喷水,特别是刚发动时更厣害。驾驶员反映发动机无劲、功率不足,加速上不来。经多次维护,换气缸垫,和把缸盖固定螺栓加足后,故障仍未排除。经拆卸缸盖仔细检查,发现缸体上平面螺孔内大部分均有铁锈粉等杂质,有的约占孔 The engine of a passenger car in our department rammed the cylinder cushion several times, often infiltrating the oil in the water tank; the exhaust pipe was sprayed with water, especially when it was just started. The driver reflects the engine is not strong, lack of power, acceleration can not come. After repeated maintenance, exchange cylinder pad, and the cylinder head bolts to add enough, the fault has not been ruled out. After careful inspection of the demolition cylinder head and found that most of the plane screw holes on the cylinder are rust powder and other impurities, and some account for the hole