A timing chain needs to be replaced. You can use our estimator tool on this site but it may be best to talk to a shop. Most of the time you replace a few other things while you're in there.
https://repairpal.com/estimator
Alex
RepairPal Certified shops can diagnose and repair your 2007 Kia Rondo. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.