while you have everything apart, change the fuel filter, timing belt, idler springs and pulleys. you'll be taking the fan out clean the clutch of the fan while it's out. change the plugs, inspect the wires. I bought mine from a fellow in Arizona, who sells on eBay. he calls himself the parts Dinosoar in the ebay stores.(
http://stores.ebay.com/PartsDinosaur_KIA-Parts. Sent pullys, belts, tensioner spring, gaskets, torque specs, everything. The belts were from Gates.
I also found that the power steering belt improved greatly by using a belt that had notches on the inside instead of smooth like Kia belts, again Gates makes them. Then the damed squeeking when it rained, when away.