What does coolant mean in Hyundai vehicles?

[Grant]

In Hyundai vehicles, coolant refers to antifreeze (coolant). This label can be found on the antifreeze reservoir, and the indicator light on the dashboard may also display it. The functions of antifreeze are as follows: 1. Protect the engine: (1) In winter, prevent the coolant from freezing and damaging the engine: When parking in cold winter, it prevents the coolant from freezing, which could otherwise expand and crack the radiator or freeze and damage the engine cylinder block or head. (2) In summer, avoid overheating: During high summer temperatures, it effectively raises the boiling point to prevent overheating. Automotive antifreeze plays a significant role, directly affecting the vehicle's performance and lifespan. 2. It has anti-corrosion properties, protecting all these metals: Since the engine cooling system includes metals such as steel, aluminum alloy, cast iron, and copper, the cylinder block and head are generally made of cast aluminum or cast iron, and the radiator is mainly made of red copper and brass. Antifreeze is in long-term contact with these metals and must protect all of them. Using deionized water and appropriate additives can prevent various types of corrosion.