What is the composition of coolant?

[VanJourney]

The main components of coolant are: water, antifreeze, and additives. Depending on the freezing point, the mixing ratio of these three materials varies. Coolants can be alcohol-based, glycerol-based, or ethylene glycol-based. When adding coolant, it is important to note that different brands, models, and manufacturers should not be mixed. The functions of coolant are: 1. To prevent the coolant from freezing in cold seasons when the vehicle is parked, which could cause the radiator to crack and the engine cylinder block to freeze; 2. To prevent corrosion of metal parts and aging of rubber components; 3. To reduce the formation of scale, which could block the circulation pipes and affect the cooling system's heat dissipation function; 4. To prevent the engine water temperature from becoming too high, ensuring the engine operates at the correct working temperature; 5. To provide lubrication for the water pump thermostat and other components.