What is the function of antifreeze?
2 Answers
Antifreeze is a type of coolant containing special additives, primarily used in liquid-cooled engine cooling systems. It offers excellent performance in preventing freezing in winter, boiling in summer, and protecting against scale and corrosion throughout the year. How to choose antifreeze: The basic indicators of antifreeze are its freezing point and boiling point. On the market, antifreeze is available in several specifications with freezing points of -15°C, -25°C, -30°C, and -40°C. Generally, it is advisable to choose an antifreeze with a freezing point at least 10°C lower than the lowest temperature in your region. Composition of antifreeze: The main components of antifreeze are: 50% purified water, 40% methanol, and 10% other substances. Antifreeze replacement cycle: Vehicle antifreeze generally needs to be replaced every 2 years or 40,000 kilometers. This is just a reference cycle. For commercial vehicles with longer mileage, the replacement cycle is shorter. Since driving conditions vary for each vehicle, the replacement should be chosen based on actual usage. Check the condition of the antifreeze; if it is found to be insufficient, replenish it promptly. If suspended particles, sediment, or signs of deterioration or discoloration are observed in the antifreeze, replace it immediately and clean the system.
Having driven for many years, I deeply understand that the importance of antifreeze goes far beyond just preventing freezing. In winter, it prevents the engine coolant from freezing, avoiding engine cracks, while in summer, it raises the boiling point to prevent overheating and boiling, ensuring the engine operates normally. Additionally, the anti-corrosion and anti-rust functions of antifreeze should not be underestimated—it reduces scale and corrosion buildup in pipes and radiators, extending the lifespan of the entire cooling system. I always check the concentration and level of antifreeze during every maintenance service. If the concentration is too low, the freeze protection is insufficient; if it's too high, it affects fluidity. I recommend using ethylene glycol-based antifreeze, replacing it every two to three years or according to the manufacturer's guidelines. Neglecting it could lead to costly repairs, such as radiator blockages or engine failure, which is not worth the risk. Regularly ensure the fluid level stays between MIN and MAX, and address any discoloration or cloudiness promptly to save both hassle and money.
