First time changing a water pump and thermostat and i just want all the help i can get mostly on what tool I exactly need to get the fan off and any tips or tricks that'll make it easier. I have 2002 dodge Durango 5.9

 

You need a big adjustable and a hammer, That will most of the time break it loose(keep the belt on). When you remove the bolts put them in the new one so you know where they go back in(different lengths). Also make sure you get a new bypass hose.

 

On the 4.7L, I laid a strip of cardboard on the fan pulley to protect it, then gripped the pulley edge-wise with a channel lock. Was able to lock it against something, then pulled the fan nut with another large channel lock. (Didn't have an adjustable wrench big enough to fit that thing).