油底壳为什么常渗水某台老ＮＪ—７０型柴油汽车在使用过程中脱水后骤加冷水，第二天发现发动机油底壳油面升高，机油内有渗水。经拆卸检查发现其中一只气缸套的上台阶处呈环状断裂，更换新缸套和机油后继续工作。第二天出车检查又发现更换的缸套故障同前，只得再更换缸套... Why oil pan often seepage Some old NJ-70 diesel car in the course of dehydration after the sudden addition of cold water, found the engine oil pan the next day the surface of oil, there is water seepage within the oil. After demolition inspection found that one of the cylinder liner on the ring was broken ring, after the replacement of new liner and oil to continue to work. Check out the car the next day and found that the replacement of the cylinder with the fault before, had to replace the cylinder liner ...