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Home >> Kia >> 2020 >> Optima EX Premium >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Intake And Exhaust System - 2.0L (Except HEV)) >> Turbocharger, Exhaust Manifold And Catalytic Converter >> Repair Procedures >> Removal And Installation

Removal And Installation

WARNING: This page is about a different variant/trim than selected.
  1. Remove the engine cover.

    (Refer to Engine and Transaxle Assembly - "ENGINE COVER ")

  2. Disconnect the battery negative terminal.
  3. Remove the air cleaner.

    (Refer to Intake and Exhaust System - "AIR CLEANER ")

  4. Remove the intercooler inlet pipe & hose assembly.

    (Refer to Intake and Exhaust System - "INTERCOOLER ")

  5. Disconnect the oxygen sensor connectors (A).
    G12921940Courtesy of KIA MOTORS AMERICA, INC.
  6. Remove the exhaust upper heat protector bolt (A).

    Tightening Torque: 

    7.8 - 11.8 N.m (0.8 - 1.2 kgf.m, 5.8 - 8.7 lb.ft)

    G12921941Courtesy of KIA MOTORS AMERICA, INC.
    CAUTION: Check that engine is cool enough to work.
  7. Remove the turbocharger heat protector (A).

    Tightening Torque: 

    7.8 - 11.8 N.m (0.8 - 1.2 kgf.m, 5.8 - 8.7 lb.ft)

    G12921942Courtesy of KIA MOTORS AMERICA, INC.
  8. Intake & Exhaust System-Turbocharger & Exhaust Manifold - REPAIR PROCEDURES 
  9. Remove the heated oxygen sensor from the warm-up catalytic converter (WCC).

    (Refer to Engine Control/Fuel System - "HEATED OXYGEN SENSOR (HO2S) ")

  10. Remove the warm-up catalytic converter (WCC) heat protector (A).

    Tightening Torque: 

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

    G12921943Courtesy of KIA MOTORS AMERICA, INC.
  11. Remove the front muffler.

    (Refer to Intake and Exhaust System - "MUFFLER ")

  12. Remove the warm-up catalytic converter (WCC) bracket (A).

    Tightening Torque: 

    Bolts (B):

    18.6 - 27.5 N.m (1.9 - 2.8 kgf.m, 13.7 - 20.3 lb.ft)

    Bolts (C):

    52.0 - 57.9 N.m (5.3 - 5.9 kgf.m, 38.3 - 42.7 lb.ft)

    G12921944Courtesy of KIA MOTORS AMERICA, INC.
  13. Remove the warm-up catalytic converter (WCC) (A) and gasket.

    Tightening Torque: 

    49.0 - 53.9 N.m (5.0 - 5.5 kgf.m, 36.2 - 39.7 lb.ft)

    G12921945Courtesy of KIA MOTORS AMERICA, INC.
  14. Remove the driveshaft mounting bracket (A).

    Tightening Torque: 

    49.0 - 63.7 N.m (5.0 - 6.5 kgf.m, 36.2 - 47.0 lb.ft)

    G12921946Courtesy of KIA MOTORS AMERICA, INC.
  15. Disconnect the oil drain pipe (A), and then remove the oil feed pipe (B).

    Tightening Torque 

    Bolts & Nuts:

    7.8 - 11.8 N.m (0.8 - 1.2 kgf.m, 5.8 - 8.7 lb.ft)

    Eye bolt:

    11.8 - 17.6 N.m (1.2 - 1.8 kgf.m, 8.7 - 13.0 lb.ft)

    G12921947Courtesy of KIA MOTORS AMERICA, INC.
    NOTE:
    • When installing the oil feed pipe & hose, make sure the stopper (A) don't touch the compressor housing.
    • Be careful not to bend or crush the pipe & hose.
    • When installing, be sure the eye bolt o-rings are completely seated in both hole of oil feed pipe.
    • When installing, clean the gasket surface and replace the oil drain pipe gasket with new one.
    G12921948Courtesy of KIA MOTORS AMERICA, INC.
  16. Remove the turbocharger water drain hose (A), and then remove the lower heat protector (B).

    Tightening Torque: 

    7.8 - 11.8 N.m (0.8 - 1.2 kgf.m, 5.8 - 8.7 lb.ft)

    G12921949Courtesy of KIA MOTORS AMERICA, INC.
  17. Disconnect the turbocharger water feed hose (A) and the electric waste gate actuator (EWGA) connector (B).
    G12921950Courtesy of KIA MOTORS AMERICA, INC.
  18. Remove the turbo manifold module.

    Tightening Torque: 

    49.0 - 53.9 N.m (5.0 - 5.5 kgf.m, 36.2 - 39.7 lb.ft)

    G12921951Courtesy of KIA MOTORS AMERICA, INC.
    G12921952Courtesy of KIA MOTORS AMERICA, INC.
    NOTE: When installing, replace with a new gasket. When installing the turbo manifold module, tighten the nuts with pre-torque first, and then tighten the nuts with specified torque in the sequence shown.
    Fig 1: Exhaust Manifold Nuts Tightening Sequence
    G12921953Courtesy of KIA MOTORS AMERICA, INC.
  19. Remove the turbo charger manifold gasket (A).
    G12921954Courtesy of KIA MOTORS AMERICA, INC.
  20. Remove the exhaust upper heat protector (A).

    Tightening Torque: 

    7.8 - 11.8 N.m (0.8 - 1.2 kgf.m, 5.8 - 8.7 lb.ft)

    G12921955Courtesy of KIA MOTORS AMERICA, INC.
  21. Remove the water feed pipe (A) and drain pipe (B).

    Tightening Torque: 

    26.5 - 32.4 N.m (2.7 - 3.3 kgf.m, 19.5 - 23.7 lb.ft)

    G12921956Courtesy of KIA MOTORS AMERICA, INC.
  22. Install in the reverse order of removal.
    NOTE:
    • Always use the new turbo manifold module and turbo adapter gaskets when replacing.
    • Take care whether the oil feed pipe & hose assembly is interfered with turbo manifold module and any surrounding parts.
    • If the oil feed pipe & hose is damaged, engine oil is not supplied sufficiently to the turbocharger then it may damage the turbocharger. If the oil drain pipe & hose is damaged and clogged, engine oil is not drained smoothly then it may cause oil leaks from the turbocharger. Be careful the oil feed pipe & hose not to damage. (bent, crushed, torn or cracked).