Can I Add a Little Water to Antifreeze?

[Camila]

Adding a little water to antifreeze is acceptable, but using water as a substitute for antifreeze can easily cause scale formation in the engine cooling system, which may clog pipes and affect the normal operation and lifespan of the car engine. Additionally, adding too much water to antifreeze can lead to engine overheating. Therefore, it is recommended not to add water. Generally, antifreeze is composed of a mixture of water and concentrate. When antifreeze is insufficient, you can add an appropriate amount of water, but avoid using tap water—use soft water or distilled water instead. It is important not to add too much water, as this can alter the freezing point of the antifreeze. Antifreeze prevents the coolant from freezing during cold winter stops, which could otherwise crack the radiator and damage the engine block. Its full name is antifreeze coolant.