The radiator is an important part of your car's engine cooling system, circulating water or coolant through small tubes that are cooled by the incoming air. This fluid circulates around the hot engine, cooling metal parts by transferring heat to the radiator, where it is cooled and then recirculated.
Buildup from heated metal and evaporated water can clog the radiator over time, while radiator fins can collect dust and road grime, as well as bugs, pebbles, and other objects from the road. A clogged or blocked radiator can cause your vehicle to overheat, which can damage or even destroy your engine.
Many manufacturers recommend that you clean the exterior of your car's radiator at least once a year. You should also thoroughly flush your radiator every five years to improve the function of your vehicle's cooling system (here's how to clean it).
To avoid damaging your radiator and engine, the choice of cleaning product is important. Avoid vinegar, as acetic acid can make metals susceptible to rust. Also, never use bleach, as sodium hypochlorite (bleach) can corrode metals such as steel and aluminum. This can cause damage to your vehicle's intake manifold, block, or engine cover, as well as degradation of rubber gaskets and seals.
