Among the integral components of your Infiniti I35 cooling system is the radiator. It is basically the part that removes heat from the engine through thermo heat exchange. Usually positioned in front of the engine under the hood, your Infiniti I35 radiator is the heart of its cooling system. It removes the heat from the hot water circulating in the cooling system. Heat is transferred to the coolant, circulated to the thermostat then to the radiator. Many small tubes with cooling fins are found inside the radiator that allows the coolant to be cooled then returned to the engine.