What is the function of coolant?
2 Answers
Coolant functions: 1. Protects the engine cooling system from rust and corrosion; 2. Effectively inhibits scale formation; 3. Prevents radiator overheating and reduces coolant evaporation; 4. Provides lubrication for the water pump, thermostat, and other components. Coolant is an indispensable part of a car engine. Coolant consists of three components: water, antifreeze, and additives. Based on the antifreeze component, it can be classified into alcohol-based, glycerol-based, ethylene glycol-based, and other types of coolant. Alcohol-based coolant uses ethanol as the antifreeze, offering good fluidity and simple preparation process, but it has a low boiling point, is prone to evaporation loss, has an easily raised freezing point, and is flammable. Glycerol-based coolant has a high boiling point, low volatility, is non-flammable, non-toxic, and has low corrosiveness, but it is less effective in lowering the freezing point. Ethylene glycol-based coolant uses ethylene glycol as the antifreeze and is prepared by adding a small amount of comprehensive additives such as anti-foam and anti-corrosion agents.
Coolant is absolutely crucial, as I've learned from over a decade of driving experience. Its primary function is to cool down the engine. When driving, engine temperatures can skyrocket, and without proper cooling, it can easily lead to cylinder explosions or damage to internal components. Additionally, when winter temperatures drop below freezing, coolant prevents freezing and expansion, avoiding cracked hoses or radiators. It also contains rust inhibitors and anti-corrosion additives to protect metal parts from rust and corrosion, extending the system's lifespan. I often advise car owners to regularly check fluid levels and replace it every two years, choosing the correct color and type without mixing—for example, green and blue formulas differ. Neglecting coolant maintenance long-term can cause major issues like leaks or overheating breakdowns, forcing you to spend extra on towing and repairs. So don't underestimate this little thing.
