go here = How - To Set DOHC Cam Timing (Please Make Sticky!! )
THat's the timing how-to I submitted, Thwater pump is easy to remove once you do the above procedure in the link, Remove the water pump pulley by removing the 3 bolts holding it on, then remove timing components to gain acess to the Water pump, which is held in by 4 bolts and a rubber gasket/seal. If your replacing your water pump then you should do a timing belt as a precaution. And if your loosing coolant check the tank, sometimes they crack and only release coolant when they get hot (expand and release coolant in small amounts)
Let me know if you need anything else.