The water pump is very vital to any engine, but to the 6.0L, it is crucial. Because of all the added heat thanks to the EGR system, the water pump becomes even more crucial, which prompted Navistar to upgrade to a bigger pump in late 2004. This video will show you how to access the water pump on a very cramped 6.0L engine bay.
Video 1 Contains:
Things to consider: