How long does it take to change a timing belt on a 2008 Kia Rio?

I use an estimation program that is pretty accurate, but it assumes an optimal situation where you have all the proper tools nad jacks and a good working area. It came up with approximately 7 hours of labor. If you are like me, I work very slowly to get the job done right. Also, inevitabley something is bound to go wrong. So, if there is any rusted or hard to remove harware soak it in WD40 or even better PB Blaster and wipe the rust or sorrosion of and repeat the process and let it soak overnight if possible. It can make the difference between a broken or stripped piece of hardware or it coming off in one piece. You will also need a havy impact gun or a way to hold the crank when removing the crank pulley. It is probably the hardest part of the job. You can't put a lot of heat to it becasue you may damage the main seal. So, use the PB Balster and soak it as well and use an impact six point socket as a standard socket will strip the bolt or break. You can rent an electric imapact gun at most hardware/construction rental shops.
Make sure to use the correct size socket as you will be applying up to 300 Ft-Lbs of torque to the bolt to get it to move. If you hold the crank you will need some help from a friend and a large lever to put onto the ratchet end to get it loose. Either a breaker bar or a large pole works well. You may find that you have to work the belt past the timing belt cover from underneath. I have had to cut a timing belt cover to do this, so don't get discouraged if the bolt does not come off. You can fill the gap on the cover with a piece of hose with a slit in it and some adhesive silicone.