You need to go by an auto parts store and rent or buy the fan pulley wrench set. I used a big 12" wrench and then I used one of the thin wrenches in the sets you could rent that holds around the 4 bolts on the pulley. They are thin-sized because there isn't enough room to slip two full-size wrenched back there.
Turn the wrench on the fan clutch to right and the thin wrench on the bolts to the left. Seems like a pain and is frustrating, but the hardest part is getting it off. Then putting it on is simple because you get it snug, then the rotation of the fan via the motor tightens the fan blade itself.