1, engine temperature is too high.
2. The cooling system leaks or the cooling water is insufficient.
3, water thermometer instructions are not allowed or failure.
4. There is too much scale in the cooling system and the heat dissipation effect is poor.
5, water pump, fan belt is too loose or broken.
6. The radiator guard net or radiator core ventilation pipe is blocked by sundries, resulting in poor heat dissipation.