Engine overheating is a common vehicle failure. If it is not handled in good time, it will cause engine dynamic performance to decline, and it will also damage parts when serious. Related experts told reporters that checking the engine is very important. If it is found that the temperature is too high or the temperature indicator is abnormal, it is necessary to check whether the cooling water of the water tank is normal, including the leakage of the water tank, water pipe and the joint. If a distance is run, the temperature is too high and the stop check finds that the cooling water is reduced much, then it can be speculated that the water jacket of the cylinder body has sand hole or perforation. When the engine temperature is too high, you can use hand to touch the temperature of the water pipe and the underwater pipe to judge the fault. If the temperature difference between the two water pipes is very large, the thermostat can not be worked. If there is air in the cooling system, air resistance will be formed, resulting in poor circulation of cooling water, resulting in high engine temperature. The following methods can be used to deflate: make the engine run at a high speed, gently unscrew the lid of the tank until the gas is released, and there will be some cooling water flowing out with the gas so many times until the gas is put out. After the troubleshooting, the cooling water should be supplemented in time. If the vehicle runs in the dirt road or the muddy section for a long time, there will be some dirty objects attached to the radiator, which will affect the heat dissipation for a long time and cause the water temperature to be too high. In this case, we can first use the compressed air to blow the radiator grille and then flush it with the water pipe.