A Radiator Core is like your engine’s air conditioner. We send hot coolant through its thin tubes and fins, and air cools it off as we drive or the fan spins. It sits right behind the front grill so it catches airflow. Made of aluminum or copper, it moves heat out fast. If it leaks or clogs, the engine gets too hot – like us without a breeze. We flush it, fix bent fins, and keep it clean so our machine doesn’t overheat.