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Home >> Kia >> 2012 >> Optima LX, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Front Axle Assembly - HEV) >> Front Hub Knuckle >> Repair Procedures >> Replacement
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Repair Procedures: Replacement

WARNING: This page is about a different variant/trim than selected.
  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: Identifying Wheel Nuts, Front Wheel And Tire
    G08308161Courtesy 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: Identifying Brake Caliper Mounting Bolts And Brake Caliper Assembly
    G08308162Courtesy 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: Identifying Driveshaft Nut
    G08308163Courtesy 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: Identifying Tie Rod End Ball Joint, Split Pin And Castle Nut
      G08308164Courtesy 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: Identifying Wheel Speed Sensor With Mount Bolt
    G08308165Courtesy 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: Identifying Strut Assembly With Bolt And Nut
    G08308166Courtesy of KIA MOTORS AMERICA, INC.
  8. Disconnect the driveshaft (A) from the front hub assembly.
    Fig 7: Identifying Front Hub Assembly Driveshaft
    G08308167Courtesy 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: Identifying Lower Arm With Bolt And Nut
    G08308168Courtesy of KIA MOTORS AMERICA, INC.
  10. Install in the reverse order of removal.