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The car radiator is an important part of your vehicle's cooling system. If your vehicle is overheating, looking into your car radiator is an obvious place to start.
To remove vehicle heat, the radiator fan blows outside air across thin fin tubes filled with hot coolant. If the fin tubes are clogged on the outside of the radiator, air can't flow past them and the radiator fan can't do its job to cool down the tubes. You can start troubleshooting by inspecting the radiator's exterior.