Can You Add Water to Coolant?

[LeAiden]

Engine coolant should not be mixed with water. Antifreeze should not be mixed either, as different formulations can easily cause chemical reactions. It is especially not advisable to add water simply because there isn't enough coolant, as this can lead to sediment formation and increase the risk of partial freezing. Coolant consists of three components: water, antifreeze, and additives. Depending on the antifreeze ingredient, it can be classified into alcohol-based, glycerol-based, or ethylene glycol-based types. When using coolant, its freezing point should be approximately 10°C lower than the lowest environmental temperature. There are many types of coolant available in the automotive parts market, but what is labeled as 'coolant' is often just 'antifreeze,' mostly made by mixing alcohol and water with added dyes. These products lack the necessary additives that proper coolant should contain, have a boiling point around 90°C, and are highly corrosive, which can easily lead to engine overheating.