Repair procedures: Removal

Disconnect the battery negative terminal.
Remove the plastic engine cover (A).
Remove the air cleaner assembly.
1. Remove the air duct (B).
2. Disconnect the breather hose (C) and the intensifier hose (D).
3. Disconnect the air intake hose and then remove the air cleaner assembly (E).
  Tightening torque
  
  Hose clamp bolt:
  
  2.9 ~ 4.9N.m (0.3 ~ 0.5kgf.m, 2.2 ~ 3.6lb-ft)
  
  Air cleaner assembly bolts:
  
  7.8 ~ 9.8N.m (0.8 ~ 1.0kgf.m, 5.8 ~ 7.2lb-ft)
  
  Fig 1: Identifying Breather Hose, Intensifier Hose, Air Cleaner Assembly And Plastic Engine Cover
  Courtesy of KIA MOTORS AMERICA, INC.
Loosen the drain plug (A), and drain the coolant. Remove the radiator cap to speed draining.

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

Fig 3: Identifying Radiator Upper Hose
Courtesy of KIA MOTORS AMERICA, INC.
Disconnect the intake OCV (Oil control valve) connector (A).

Fig 4: Identifying Intake Oil Control Valve Connector
Courtesy of KIA MOTORS AMERICA, INC.
Disconnect the VIS (Variable intake system) connector (A), oil pressure switch connector (B), knock sensor connector (C) and the air compressor connector (D).

Fig 5: Identifying Variable Intake System Connector, Oil Pressure Switch Connector, Knock Sensor Connector And Air Compressor Connector
Courtesy of KIA MOTORS AMERICA, INC.
Disconnect the injector connectors (A).

Fig 6: Identifying Injector Connectors
Courtesy of KIA MOTORS AMERICA, INC.
Disconnect the ETC (Electronic throttle control) connector (A) and MAPS (Manifold absolute pressure sensor) & IATS (Intake air temperature sensor) connector (B).

Fig 7: Identifying Electronic Throttle Control Connector And Manifold Absolute Pressure Sensor Connector
Courtesy of KIA MOTORS AMERICA, INC.
Disconnect the VCM (Variable charge motion) connector (A).

Fig 8: Identifying Variable Charge Motion Connector
Courtesy of KIA MOTORS AMERICA, INC.
Disconnect the PCV (Positive crankcase ventilation) hose (A).

Fig 9: Identifying Positive Crankcase Ventilation Hose
Courtesy of KIA MOTORS AMERICA, INC.
Disconnect the fuel hose (A).

Fig 10: Identifying Fuel Hose
Courtesy of KIA MOTORS AMERICA, INC.
Disconnect the brake booster vacuum hose (A), PCSV (Purge control solenoid valve) hose (B) and throttle body coolant hoses (C).

Fig 11: Identifying Brake Booster Vacuum Hose, Purge Control Solenoid Valve Hose And Throttle Body Coolant Hoses
Courtesy of KIA MOTORS AMERICA, INC.
Disconnect the sensor connector from the bracket and remove the intake manifold stay (A).
Tightening torque :

18.6 ~ 23.5N.m (1.9 ~ 2.4kgf.m, 13.7 ~ 17.4lb-ft)

Fig 12: Identifying Intake Manifold Stay
Courtesy of KIA MOTORS AMERICA, INC.
Remove the intake manifold (A).
Tightening torque :

Bolts & Nuts :

18.6 ~ 23.5N.m (1.9 ~ 2.4kgf.m, 13.7 ~ 17.4lb-ft)

Fig 13: Identifying Intake Manifold
Courtesy of KIA MOTORS AMERICA, INC.
Installation is reverse order of removal.