4-5. Make sure to use a few washers under each nut on the water pump pulley when putting the nuts used to hold the fan assembly in place on. Since the fan is now gone, the nuts will sink too far down, and they'll seize on the bolts that are reverse-threaded into the pulley mount. Yeah, we blew it, so you'd better not. Also, if you don't use washers, the pulley won't be spaced out far enough, and you'll have a noisy operation from the pulley and premature wear (a bad thing, trust us).