To replace the throttle body heater hose start your replacement by dissembling the air cleaner intake duct, add draining the cooling system. Then, unscrew the throttle body inlet hose clamp and hose from the coolant pipe, followed by throttle body inlet hose clamp and hose from the throttle body and the vehicle. In installing, first connect the throttle body inlet hose and the hose clamp to the throttle body, and then to the coolant piping. Lastly, install the air cleaner intake duct back and refill the cooling system.