Tara, you will have to remove the timing belt to change the water pump. That is a disadvantage of driving the pump with the timing belt.
If your still game,
1) Remove damper bolt. You will need to keep the engine from rotating somehow. It's not good to turn it in the clockwise direction. If you have a manual tranny, you could put it in gear and have someone stand on the brake. Otherwise, you'll need to jam the flywheel somehow. A rubber strapwrench around the damper might also work(never tried it though, just an idea.)
2) Damper will now slide right off.
3) Get a paint marker and put a paint mark on the edge each pulley (2 cam & 1 crank). Then put a mark on the belt right next to each mark you made on the pulley. This is so you can put the belt back on in the exact same spot. You cannot be even one tooth off.
4) Remove belt tensioner.
5) Slide belt off of sprockets.
6) replace water pump.
7) put everything back together taking special care to set the tensioner correct using the built-in mark.
Note: The valve springs may cause a cam to move slightly when you release the tension on the belt. Don't worry. When you're ready to put the belt back on, turn the cam a little with an open end wrench using the cast-in hexagon on the cam. That's what they're for. As long as your paint marks line up when you're done, you're good. Also, don't loosen the cam sprocket bolts or you're paint marks won't be of any use.
