Before you can replace the Radiator surge tank inlet hose/pipe, you should first drain the cooling system using the vac-n-fill method. Then, slide the surge tank inlet hose clamp to the surge tank and take off the surge tank inlet hose from the Radiator. Then, adjust the surge tank inlet hose clamp so it's at the surge tank and take out the surge tank inlet hose from the surge tank. As the first step for installation, put the surge tank inlet hose onto the surge tank and fit the surge tank inlet hose clamp onto the surge tank. After that, join the surge tank inlet hose onto the Radiator and place the surge tank inlet hose clamp onto the Radiator. At the end, use the vac-n-fill system to fill the cooling system.