发动机冷却液温度过高或过低的故障分析及排除

A Case Study of Engine Accident Caused by Over-heated Coolant or Lower Temperature and Solution

为了使发动机处于最佳工作状态，发动机冷却液的正常工作温度应控制在85-95℃。如冷却液温度过高不仅使发动机的动力性和经济性下降，更严重的将导致发动机机件损坏，发生重大机械事故；冷却液温度过低，则发动机的经济性下降，机械磨损增加。发动机既怕冷更怕热，与人体一样必须保持正常的温度才能正常运转。

The operating temperature of engine coolant should be in a range of 85 to 95 centigrade that is able to make sure that engine is operating under the perfect condition. Overheated coolant will not only reduce the driving power and operating economy of the engine, but also possibly damage the engine which may cause serious mechanic accident. But if the temperature is too lower, the operating economy will dramatically decline, and cause unnecessary wore out.