In this tutorial, we learn how to replace the top coolant radiator hose in a Ford F-150. If you notice that your hose is leaking and fluid, this is a sign you need to replace the hose! First, remove the coolant from the car so you can remove your hose. After you are sure you have removed all the coolant, you will then want to perform a back flush on the vehicle and flush the radiator. When you are finished with this, you will need to replace the hose and then replace all the fluids back in your car. When finished, drive the car and make sure the temperature is even and everything is staying the same!