It is the Ford radiator core where the actual cooling process of your coolant system takes place. This component has many small channels where the coolant flows through that absorb the heat from the engine. As air passes over the channels, the heat is dissipated. If these channels in the radiator core become clogged or sediment builds up in them, the effectiveness of this component is diminished. Sediment build up in the Ford radiator core occurs because too much hard water is added to the coolant system. It also occurs when the coolant system is not regularly flushed. This flushing is recommended annually. Just draining the radiator core on your Ford is not sufficient to remove this sediment, it must be flushed. To flush your radiator core on your Ford the top radiator hose has to be disconnected. This discharges all of the coolant as it leaves the engine onto the ground. A water hose should be placed in the radiator so the coolant system will have a supply of coolant. This has to be done with the engine running. At first nothing will be coming from the disconnected hose until the thermostat open. When the water coming from the radiator hose is clear, the system is flushed and the engine turned off. The hose on the bottom of the radiator core should then be disconnected and the system allowed to fully drain. With all of the hoses reconnected the Ford?s coolant system should be refilled with fresh coolant and water in the correct ratio. When this flushing process is completed annually, the components of your coolant system should remain healthy and functional for an extended period of time when operating your vehicle.