There are many parts that make up this cooling system, including the water pump, thermostat, hoses, fans and the radiator. The radiator is a heat exchange that cools fluid, which cools down the engine.
Essentially, the radiator is Grand Central Station for an engine’s cooling system, The mixture of antifreeze and water that cools the engine continually passes through the radiator. From there, it discharges some of the heat it gathered from the engine and takes in cooler air before it circulates again around the engine. A spur line sends warm coolant to the heater core to generate heated air for the interior when required.
A water pump circulates the coolant around the engine, and a thermostatically controlled fan behind the radiator turns on as needed to bring more air through the radiator to help cool the antifreeze/water.
Today, most radiators are made of aluminum and plastic and can typically prevent rust, however, sometimes the metal can still corrode. Antifreeze has rust inhibitors that can break down over time. When this happens, corrosion can occur and cause damage to cooling fins inside the radiator and rust to occur from the inside and result in leaks.
A few signs that your radiator specifically is having issues can include:
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