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故障现象与排除。我驾驶的一辆皇冠(crown)牌MS122型轿车,已行驶10多万千米,发动机从未调校和修理过。最近发现冷车起动后,听到车内有类似活塞销磨损间隙过大的敲缸声,并明显感觉就在车内后左角。如果送修的话,需将整台发动机拆下检查,修理费高达6000元。在这种情况下,我们决定自行检修。经拆除后坐椅,起动发动机,用特大号长起子,对发动机及全车作触听式检查,终于在车身左后坐位地板下通油箱的弧形油管转弯处,发现声响发生点。用手触摸供、回油管时,有脉冲震荡感,特别是回油管感觉更为明显,经换汽油泵后响声排除。故障原因分析:解剖汽油泵,发现泵膜有皱裂痕,失去原有弹力,有渗油情况,最主要是泵
Symptoms and troubleshooting. I drive a crown brand MS122 sedan, has traveled more than 100,000 km, the engine has never been adjusted and repaired. Recently found that after the cold car started to hear the car has a similar piston pin wear clearance too large knocking sound, and obviously felt in the car after the left corner. If the repair, then need to remove the entire engine inspection, repair costs up to 6,000 yuan. In this case, we decided to overhaul. After the removal of the chair, start the engine, with extra large long screwdriver, the engine and the whole car as a touch-check, finally in the car seat left under the floor arc through the tank curvature of the pipe and found the sound occurred. Hand for the touch, back to the tubing, there is a sense of pulse shock, especially the return pipe feel more obvious, after the replacement of the noise emitted by the pump. Analysis of the cause of the malfunction: Dissecting the gasoline pump, found that the pump membrane wrinkled cracks, loss of the original elasticity, the case of oil leakage, the most important pump