Can You Add Pure Water to a Car Radiator?

[LilahLee]

You cannot add pure water to a car radiator because the radiator contains antifreeze, which has different boiling and freezing points compared to pure water. Additionally, pure water may cause scaling and corrosion in the cooling system. Below is relevant information: Composition: Antifreeze mainly consists of ethylene glycol and water, which is conductive. Generally, engine antifreeze should be replaced every two to three years to prevent severe engine damage over time. Function: Antifreeze prevents the coolant from freezing during cold winter parking, which could otherwise crack the radiator or damage the engine cylinder block. It also provides anti-corrosion protection for cooling system components, prevents scaling, and avoids reducing the radiator's heat dissipation efficiency.