HI if your car is manual just put the car in gear and have someone put there foot hard on the brake then undo the nut i got my bottom pulley of by tapping it with a soft face hammer dont try this with any other type hammer dont hit the pulley to hard as you will break it as it made of cast metal and will break easily or buy the correct puller and no the rad does not have to come out but you will have to take the cooling fans out the way hope this helps
tony