Timing belt jumped, from googling Kia Rio's it's pretty apparent that on this car it's critical to replace the timing belt when suggested at 60,000 miles. Numerous people with 2001 2002 rio's with ruined engines from Timing belts that jumped with mileage between 55,000 and just over 100,000 miles. It's mine own fault for not changing the belt, before this issue came up it was a pretty good car. Just adding my two cents and hope that someone else reads this and saves their engine before it's two late.