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冷却液频繁短缺故障现象一辆大通V80车,累计行驶了约3 000多km,发动机加速无力,排气管冒白烟,储液罐内冷却液严重短缺。检查分析经过了解得知,驾驶人发现储液罐内冷却液短缺后,将冷却液补充至正常液位,但行驶了约50 km后,储液罐内冷却液又会严重短缺。检查发动机中的机油量,发现已明显高出上刻线;检查机油品质,发现已经变色、乳化,机油盖中也有明显的水迹(图2)。联系售后技术部后,要求笔者临时更换EGR冷却器(因该类车曾出现过EGR冷却器被废气碱透,冷却液与废气
Shortage of cooling fluid Symptom One Chase V80 car has accumulated about 3,000 km in total. The engine accelerates weakly, exhaust pipes smoke white smoke, and there is a serious shortage of coolant in the liquid storage tank. Inspection and Analysis It is understood that after the driver found that there was a shortage of coolant in the tank, the coolant was replenished to the normal level but after about 50 km of driving, there was a serious shortage of coolant in the tank. Check the amount of engine oil, found significantly higher than the engraved line; check the quality of the oil, discoloration, emulsification, there are obvious traces of oil in the oil cover (Figure 2). After-sales technical department, the author asked me to temporarily replace the EGR cooler (because of such vehicles had appeared in the EGR cooler was exhaust gas, coolant and exhaust