Remove clips that hold radiator on top and bottom. Seperate the fan and shroud from the radiatior itself. Drain the radiator into a pan, also remove any obstruciton that could hinder radiator being removed.
Replace the radiator by first unscrewing the fun which is behind the radiator. That can easily be taken out. Than drain all of the fluids from the the radiator disconnect all hoses. Unscrew than pull out.