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车型:日产蓝鸟SSS轿车,电喷发动机。故障现象:发动机在大雨中运行,经过一个深水坑,运行约2min后,车自动熄火,再也无法启动。诊断与排除:该车整个发动机被水全部冲湿,发动车时感觉启动机咬住,发动机不运转。拆下空气滤清器,发现空气滤芯有水,空气流量计及进气岐管也有水,由于发动机已无法运转,因此考虑发动机气缸已吸入水,由于水分进入气缸后,受热膨胀,很难压缩,导致发动机曲轴承受负荷急剧加水,从而容易造成曲轴损坏。拆下发动机总成,解体发动机,发现曲轴弯曲。进行发动机大修,更换了曲轴、轴承、活塞及活塞环、进排气门等部件,装好发动机总成后,重新发动车,启动机工作恢复正常,但发
Model: Nissan Bluebird SSS sedan, EFI engine. Symptom: Engine running in heavy rain, after a deep puddle, running for about 2min, the car automatically flameout, can no longer start. Diagnosis and Exclusion: The entire car was wet all over the engine water, start feeling when starting the engine bite, the engine does not run. Remove the air filter and found the air filter water, air flow meter and intake manifold also have water, because the engine has been unable to run, so consider the engine cylinder has inhaled water, as water into the cylinder, heated expansion, it is difficult to compress , Resulting in a sharp increase in engine crank load water, which is likely to cause damage to the crankshaft. Remove the engine assembly, disintegrate the engine and found crankshaft bending. Engine overhaul, replacement of the crankshaft, bearings, piston and piston rings, intake and exhaust valves and other components, installed engine assembly, restart the car, starter work back to normal, but the hair