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Home >> Kia >> 2020 >> Optima EX Premium >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (Engine Cooling System - 2.0L (Except HEV)) >> Water Temperature Control Assembly >> Repair Procedures >> Replacement

Repair Procedures: Replacement

WARNING: This page is about a different variant/trim than selected.
  1. Disconnect the battery negative terminal.
  2. Loosen the drain plug and drain the engine coolant.

    (Refer to Cooling System - "COOLANT ")

  3. Remove the air cleaner.

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

  4. Remove the intercooler inlet pipe & hose assembly, and the intercooler outlet pipe & hose assembly.

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

  5. Remove the radiator upper (A) hose and lower hose (B).
    G12921732Courtesy of KIA MOTORS AMERICA, INC.
  6. Disconnect the connectors and then remove the wiring protector (A).
    G12921733Courtesy of KIA MOTORS AMERICA, INC.
  7. Disconnect the E.T.C cooler hoses (A), and the oil cooler hoses (B).
    G12921734Courtesy of KIA MOTORS AMERICA, INC.
  8. Remove the water temperature control assembly (A).

    Tightening torque: 

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

    Bolt: 14.7 - 19.6 N.m (1.5 - 2.0 kgf.m, 10.8 - 14.5 lb.ft)

    G12921735Courtesy of KIA MOTORS AMERICA, INC.
  9. Install in the reverse order of removal.
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