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Home >> Kia >> 2019 >> Optima EX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 191 (Engine Cooling System (PHEV)) >> Water Temperature Control Assembly (Engine) >> Repair Procedures >> Removal and Installation >> Water Temperature Assembly

Water Temperature Assembly

WARNING: This page is about a different variant/trim than selected.
WARNING:
  • Be sure to read and follow the "GENERAL SAFETY INFORMATION & CAUTION " before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.
  • Be sure to shut off the high voltage circuit according to the "HIGH VOLTAGE SHUT-OFF PROCEDURES " before doing any work related with the high voltage system to avoid serious electrical injuries.
  1. Shut off the high voltage circuit.

    (Refer to Engine Mechanical System - "HIGH VOLTAGE SHUT-OFF PROCEDURE ")

  2. Remove the engine room under cover.

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

  3. Drain the coolant.

    (Refer to Cooling System - "COOLANT ")

  4. Remove the air cleaner assembly.

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

  5. Disconnect the purge control solenoid valve (PCSV) hose (A).
    G13155047Courtesy of KIA MOTORS AMERICA, INC.
  6. Disconnect the wiring connectors and harness clamps and remove the connector brackets around the water temperature assembly.
    G13155048Courtesy of KIA MOTORS AMERICA, INC.
  7. Remove the purge control solenoid valve (PCSV) bracket (A).
    G13155049Courtesy of KIA MOTORS AMERICA, INC.
  8. Disconnect the radiator upper hose (A).
    G13155050Courtesy of KIA MOTORS AMERICA, INC.
  9. Remove the EGR cooler pipe C (A).

    Tightening torque: 

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

    G13155051Courtesy of KIA MOTORS AMERICA, INC.
  10. Disconnect the oil cooler coolant hose (A) and ATF cooler coolant hose (B).
    G13155052Courtesy of KIA MOTORS AMERICA, INC.
  11. Disconnect the EGR cooler coolant hose (A).
    G13155053Courtesy of KIA MOTORS AMERICA, INC.
  12. Remove the EGR cooler pipe B (A).

    Tightening torque: 

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

    G13155054Courtesy of KIA MOTORS AMERICA, INC.
  13. Remove the electric control EGR valve from the water temperature assembly.

    (Refer to Engine Control/Fuel System - "ELECTRIC EGR CONTROL VALVE ")

  14. Remove the water temperature control assembly (A).

    Tightening torque 

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

    G13155055Courtesy of KIA MOTORS AMERICA, INC.
  15. Install in the reverse order of removal.
    NOTE:
    • Install a new O-ring.
    • Clean surface on the O-ring and install the O-ring after wetting with water.
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