How to Flush a Radiator

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A radiator is an important part of your car engine's cooling system, allowing water or coolant to circulate through small tubes that are cooled by incoming air. This liquid cycles around the hot engine, cooling off the metal parts by moving the heat into the radiator to be cooled before circulating again. Buildup from the heated metal and the evaporating water can clog the radiator over time.

Your choice of cleaning product is important, to avoid damaging your radiator and potentially your engine. Avoid using vinegar, because the acetic acid makes metal susceptible to rust. Additionally, bleach should never be used, because sodium hypochlorite (bleach) will corrode metals such as steel and aluminum, damaging the vehicle's intake manifold, block, or engine head as well as degrading rubberized gaskets and seals.