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Home › Kia › 2017 › Optima Plug-In Hybrid EX › Repair and Diagnosis › Engine Mechanical › Cooling Fan › Engine Cooling System (PHEV) › Water Temperature Control Assembly (Engine) › Repair Procedures › Removal And Installation › Water Temperature Assembly › Notes

Water Temperature Assembly: Notes

WARNING:
  • Be sure to read and follow the "General Safety Information and 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 SHUTOFF PROCEDURE " 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 SHUTOFF 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).
    G12352735Courtesy of KIA MOTORS AMERICA, INC.
  6. Disconnect the wiring connectors and harness clamps and remove the connector brackets around the water temperature assembly.
    G12352736Courtesy of KIA MOTORS AMERICA, INC.
  7. Remove the purge control solenoid valve (PCSV) bracket (A).
    G12352737Courtesy of KIA MOTORS AMERICA, INC.
  8. Disconnect the radiator upper hose (A).
    G12352738Courtesy 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)

    G12352739Courtesy of KIA MOTORS AMERICA, INC.
  10. Disconnect the oil cooler coolant hose (A) and ATF cooler coolant hose (B).
    G12352740Courtesy of KIA MOTORS AMERICA, INC.
  11. Disconnect the EGR cooler coolant hose (A).
    G12352741Courtesy 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)

    G12352742Courtesy 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)

    G12352743Courtesy 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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