Can I add water if my car runs out of coolant?

[ElainaLee]

You can add water to your car's coolant system. When the coolant level is below the MIN mark and no coolant is available, water can be used as a temporary substitute. However, using water as a long-term replacement for coolant is not recommended because prolonged use can lead to scale buildup on the surfaces of the radiator and water jacket, which increasingly impairs heat dissipation and is difficult to remove. The following section explains the functions of antifreeze: Anti-corrosion function: The engine and its cooling system are made of metal. These metals can corrode and rust over time when exposed to water at high temperatures. Antifreeze not only prevents corrosion in the engine cooling system but also has anti-corrosion and rust-removal properties. Anti-scaling function: High-quality antifreeze is made with distilled water and contains anti-scaling additives, which not only prevent scale buildup but also help remove existing scale.