What are the main functions of antifreeze?
2 Answers
Antifreeze, whose full name should be antifreeze coolant, means coolant with antifreeze function. Antifreeze can prevent the coolant from freezing and expanding when the car is parked in cold winter, which may crack the radiator and freeze the engine cylinder block or cover. Antifreeze is a kind of coolant containing special additives, mainly used in liquid-cooled engine cooling systems. Antifreeze has excellent performance such as antifreeze in winter, anti-boiling in summer, anti-scale and anti-corrosion all year round. The main components of antifreeze are 50% pure water, 40% methanol and 10% other substances. It is generally divided into three types: ethanol-water type, glycerol-water type and ethylene glycol-water type. How to judge whether antifreeze is lacking: Observe the antifreeze warning light on the dashboard. If it lights up, it is likely that the antifreeze is lacking, but it cannot be ruled out that it is caused by excessive temperature in the cylinder. Check the antifreeze tank. If the liquid level is below the minimum scale line (MIN), do not continue driving, and add antifreeze in time. Check the water level scale mark on the antifreeze pot. The normal antifreeze level is between the highest and lowest water levels. Whether the antifreeze is lacking or not depends on the scale. If the antifreeze is below the lowest water level, it means that the antifreeze is lacking.
The core function of antifreeze isn't just preventing engine freezing in winter; it also helps dissipate heat to prevent overheating and boiling. Imagine driving in summer with soaring water temperatures – antifreeze has a higher boiling point than water, keeping the cooling system stable and avoiding engine "boil-over." Additionally, antifreeze contains additives that protect metal components from rust and corrosion, such as pipes and radiators. Neglecting replacement can lead to clogging or leaks. My car had this issue last year due to skipped antifreeze changes, resulting in corroded coolant hoses and costly repairs. It also lubricates the water pump to prevent wear. Remember to regularly check its color and level, replacing it every two years or 50,000 km – this saves hassle, money, and prevents surprises.
