Can water be added to a car's coolant?

[McRose]

Water can be added to a car's coolant. 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 advisable, as prolonged use can lead to scale buildup on the surfaces of the radiator and water jacket, resulting in increasingly poor heat dissipation and making it difficult to clean. The full name of coolant is antifreeze coolant, and its primary function is to maintain the engine within the normal temperature range while also providing antifreeze, anti-boiling, and anti-corrosion effects. Coolant should be used year-round, and it needs to be replaced annually as part of the car's regular maintenance schedule.