Here are some instructions [http://www.ehow.com/how_6052321_change-serpentine-belt-mazda-626.html|from ehow.com] and there is a video on [http://www.ehow.com/video_4945829_mazda-626-water-pump-replacement.html|ehow] that deals with the water pump but touches on the serpentine belt. Here is another one on [http://www.instructables.com/id/Changing-your-car-s-timing-belt-and-water-pump/|instructables.com] Good Luck to you and watch the knuckle scraping. Looks pretty tight.