I've been doing some research but all I've got is more confused. I have a 2002 pathfinder 2wd auto, in this truck is it a timing belt or a timing chain?? If its a belt Im planing on replacing it now along with the water pump and other components that will fail in the future so that I dont have to touch it again for some good time other than for normal maintenance. The odo is reading 97,000 and its my DD traveling some 20-30 miles daily and often stuck in rush-hour, plus the climate here is always hot and dusty.