I replaced the timing belt yesterday, took about six hours, it helps if your hands are the size of seven year olds and you double jointed. All in all not to bad, the belt did stretch, there were no cracks, but glad I did it, I figure I had about a year left. If you do this youself and copy the directions from "raven" in Kia forums, he forgets one line the is so obvious in the middle you can't believe you did not even think of doing it..... Spoiler Space . . . . .. . . . . . .. . . . . . . . .. Remove the engine mount, there is no way on the 2003 rio to remove or place a new on.