Start by draining the cooling system before you replace the Radiator surge tank inlet hose/pipe (Non-HP2). After that, slide the surge tank inlet hose clamp over to the surge tank and take the surge tank inlet hose off the Radiator. After that, put the surge tank inlet hose clamp onto the surge tank and pull the surge tank inlet hose off the tank. At the beginning of installation, put the surge tank inlet hose into the surge tank, then attach the clamp to the tank as well. Then, put the surge tank inlet hose on the Radiator and fasten the clamp from the Radiator. Finally, fill the cooling system.