1. The water pump and thermostat are faulty.
2. The waterway is blocked. Failure to circulate cooling water has a great impact on the engine and can easily damage the engine. The car water tank, also known as the radiator, is the main component of the car cooling system. The function is to dissipate heat. The cooling water absorbs the heat in the water jacket, flows to the radiator, dissipates heat, and then returns to the water jacket to continue circulation. Thereby achieving the effect of heat dissipation and temperature regulation. It is also an important part of the car engine.