Repair procedures: Removal

Remove the under covers (A).
Tightening torque:

9.8 ~ 11.8 N.m (1.0 ~ 1.2kgf.m, 7.2 ~ 8.7 lb-ft)

Fig 1: Under Covers
Courtesy of KIA MOTORS AMERICA, INC.
Loosen the drain plug (A), and then drain the engine coolant.
CAUTION: Never remove the radiator cap when the engine is hot. Serious scalding could be caused by hot fluid under high pressure escaping from the radiator.

Fig 2: Drain Plug
Courtesy of KIA MOTORS AMERICA, INC.
Remove the radiator upper hose (A) and lower hose (B) and reservoir hose.

Fig 3: Radiator Upper & Lower Hoses
Courtesy of KIA MOTORS AMERICA, INC.
Remove the radiator.
1. Disconnect the fan connector (A) and remove the fan assembly (B).
  Tightening torque:
  
  8.8 ~ 10.8N.m (0.9 ~ 1.1kgf.m, 6.5 ~ 7.9 lb-ft)
2. Remove the radiator upper mounting brackets (C).
  Tightening torque:
  
  8.8 ~ 10.8N.m (0.9 ~ 1.1kgf.m, 6.5 ~ 7.9 lb-ft)
  
  Fig 4: Fan Connector, Fan Assembly & Radiator Upper Mounting Brackets
  Courtesy of KIA MOTORS AMERICA, INC.
  
  Coupe
  
  Fig 5: Fan Connector, Fan Assembly & Radiator Upper Mounting Brackets (Coupe)
  Courtesy of KIA MOTORS AMERICA, INC.
3. After pulling back the condenser fixing bracket and then, remove the radiator assembly.
Installation is reverse order of removal.

NOTE:

Start engine and let it run until it warms up. (Until the radiator fan operates 3 or 4 times.)
Turn off engine. Check the coolant level and add coolant if needed. This will allow trapped air to be removed from the cooling system.
Put the radiator cap on tightly, then run engine again and check for leaks.