Fan + fan clutch must come out in order to remove the shroud. To take out the fan/clutch, you need an 8mm allen wrench, an extension for leverage (I use a 10 or 12mm deep socket on a breaker bar) and a 1/4" piece of steel rod with a little 90 degree bend at the end to hook into the back of the fan pulley, and keep it from turning while you unbolt the clutch.

Don't forget to take out the steel rod when you've got everything put back together! (from experience..)