Can You Add Pure Water to a Car Radiator?

[CooperMarie]

You can add pure water to a car radiator, but not too much. It should be filled between the upper and lower scale marks on the radiator. In winter, the added antifreeze must be of the same brand; mixing different brands can damage the engine. Composition and Function of Antifreeze: Antifreeze is mainly composed of ethylene glycol and water and is conductive. Generally, engine antifreeze should be replaced every two to three years to prevent severe engine damage over time. Antifreeze prevents the coolant from freezing in cold winter conditions, which could crack the radiator or damage the engine cylinder block. It also provides anti-corrosion protection for cooling system components, prevents scale buildup, and avoids reducing the radiator's cooling efficiency. Method for Replacing Car Antifreeze: First, inspect the car for any signs of leaks. Drain the remaining antifreeze, then insert a rubber hose connected to a tap into the radiator filler port. Turn on the tap to allow tap water to continuously flow through the engine cooling system for cleaning. After cleaning, add new antifreeze.