Why is the antifreeze making a gurgling sound?

[StElliot]

If you hear a gurgling sound from the radiator when the car is parked, it needs to be checked promptly. Here are the detailed explanations: 1. When the thermostat malfunctions: It is necessary to inspect and replace the thermostat, then replace the antifreeze. 2. If the radiator cap is faulty: The water temperature sensor needs to be replaced before adding antifreeze. The car radiator, also known as the heat exchanger, is a key component in the car's cooling system. Its function is to dissipate heat. The coolant absorbs heat in the water jacket, flows to the radiator to dissipate the heat, and then returns to the water jacket to circulate, achieving temperature regulation. It is a part of the car engine.