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Home >> Kia >> 2016 >> Optima EX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 55 (Front Axle Assembly (HEV)) >> Front Hub/ Knuckle >> Repair Procedures >> Replacement

Repair Procedures: Replacement

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  1. Loosen the wheel nuts slightly.

    Raise the vehicle, and make sure it is securely supported.

  2. Remove wheel nuts, front wheel and tire from front hub.

    Tightening torque: 

    88.2 ~ 107.8 N.m (9.0 ~ 11.0 kgf.m, 65.0 ~ 79.5 lb-ft)

    Fig 1: Removing Front Nuts, Wheel And Tire From Front Hub
    G11816236Courtesy of KIA MOTORS AMERICA, INC.
    CAUTION: Be careful not to damage to the wheel nuts when removing the front wheel and tire.
  3. Remove the brake caliper mounting bolts, and then hold the brake caliper assembly (A) with wire.

    Tightening torque: 

    78.4 ~ 98.0 N.m (8.0 ~ 10.0 kgf.m, 57.8 ~ 72.3 lb-ft)

    Fig 2: Removing Brake Caliper Mounting Bolts
    G11816237Courtesy of KIA MOTORS AMERICA, INC.
  4. Remove driveshaft nut (A) from the front hub when applying the brake.

    Tightening torque: 

    215.7 ~ 254.9 N.m (22.0 ~ 26.0 kgf.m, 159.1 ~ 188.0 lb-ft)

    Fig 3: Removing Driveshaft Nut From Front Hub
    G11816238Courtesy of KIA MOTORS AMERICA, INC.
  5. Remove the tie rod end ball joint (A) from the knuckle.
    1. Remove the split pin (C).
    2. Remove the castle nut (B).

      Tightening torque: 

      34.3 ~ 44.0 N.m (3.5 ~ 4.5 kgf.m, 25.3 ~ 32.5 lb-ft)

      Fig 4: Removing Tie Rod End Ball Joint From Knuckle
      G11816239Courtesy of KIA MOTORS AMERICA, INC.
  6. Loosen the mount bolt and then remove the wheel speed sensor (A) from knuckle.

    Tightening torque: 

    6.8 ~ 10.7 N.m (0.7 ~ 1.1 kgf.m, 5.0 ~ 7.9 lb-ft)

    Fig 5: Removing Wheel Speed Sensor From Knuckle
    G11816240Courtesy of KIA MOTORS AMERICA, INC.
  7. Loosen the bolt & nut and then remove the knuckle from the strut assembly (A).

    Tightening torque: 

    156.9 ~ 176.5 N.m (16.0 ~ 18.0 kgf.m, 115.7 ~ 130.2 lb-ft)

    Fig 6: Removing Knuckle From Strut Assembly
    G11816241Courtesy of KIA MOTORS AMERICA, INC.
  8. Disconnect the driveshaft (A) from the front hub assembly.
    Fig 7: Disconnecting Driveshaft From Front Hub Assembly
    G11816242Courtesy of KIA MOTORS AMERICA, INC.
  9. Loosen the bolt & nut and then remove the lower arm (A).

    Tightening torque: 

    98.0 ~ 117.6 N.m (10.0 ~ 12.0 kgf.m, 72.3 ~ 86.7 lb-ft)

    Fig 8: Removing Lower Arm Bolt & Nut
    G11816243Courtesy of KIA MOTORS AMERICA, INC.
  10. Remove the front lower arm from the front knuckle using the SST (0K545-A9100).
    1. After removing bolts from the front knuckle, install and tighten the sub body bolt (A).
      Fig 9: Removing Front Lower Arm From Front Knuckle Using SST (0K545-A9100)
      G11816244Courtesy of KIA MOTORS AMERICA, INC.
    2. Input the sub body (A) between the front knuckle and the sub body bolt.
    3. Tighten bolt (B) of the sub body bolt to broaden the gap of the front knuckle.
      Fig 10: Inserting Sub Body Between Front Knuckle And Sub Body Bolt
      G11816245Courtesy of KIA MOTORS AMERICA, INC.
    4. Install the safe wire (A).
      Fig 11: Installing Safe Wire
      G11816246Courtesy of KIA MOTORS AMERICA, INC.
      NOTE: Install a safe wire on the front strut to prevent dropping the SST and hurting technicians.
    5. Install the main body, between the front strut and the lower arm.
      Fig 12: Installing Main Body Between Front Strut And Lower Arm
      G11816247Courtesy of KIA MOTORS AMERICA, INC.
    6. To avoid the main body coming off, install a fixing clamp (A) beside the main body.
      Fig 13: Installing Fixing Clamp Beside Main Body
      G11816248Courtesy of KIA MOTORS AMERICA, INC.
    7. After installing a fixing clamp, rotate the handle (B) clock wise till the clamp is fixed on a lower arm.
      Fig 14: Rotating Handle Clock Wise Until Clamp Is Fixed
      G11816249Courtesy of KIA MOTORS AMERICA, INC.
    8. Tighten a main body bolt (A) of the slowly and remove the lower arm from the front knuckle.
    Fig 15: Removing Slowly Lower Arm From Front Knuckle
    G11816250Courtesy of KIA MOTORS AMERICA, INC.
  11. Install in the reverse order of removal.