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Home >> Kia >> 2016 >> Optima SX Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 73 (Active Hydraulic Boost (AHB) System (HEV)) >> Front Disc Brake >> Repair Procedures >> Inspection >> Front brake disc runout check

Front brake disc runout check

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  1. Place a dial gauge about 5mm (0.2 in.) from the outer circumference of the brake disc, and measure the runout of the disc.

    Brake disc runout 

    Limit: 0.04 mm (0.0016 in.) or less (new one)

    Fig 1: Measuring Run Out Of Disc
    G11816801Courtesy of KIA MOTORS AMERICA, INC.
  2. If the runout of the brake disc exceeds the limit specification, replace the disc, and then measure the runout again.
  3. If the runout does not meet the limit specification, remove the disc, turn it 180° and reinstall. Then check the runout of the brake disc again.
  4. If the runout cannot be corrected by changing the position of the brake disc, replace the brake disc.