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Front Brake Disc Run Out Check

WARNING: This page is about a different car, the 2009 Kia Optima and 2009 Kia Magentis. However, it is still accessible from the selected car via links, so may be relevant.
  1. Place a dial gauge about 5 mm (0.2 in.) from the outer circumference of the brake disc, and measure the run out of the disc.

    Brake disc run out

    Limit : 0.04 mm (0.0016 in.) or less

    Fig 1: Measuring Run Out Of Front Brake Disc
    G06366814Courtesy of KIA MOTORS AMERICA, INC.
  2. If the run out of the brake disc exceeds the limit specification, replace the disc, and then measure the run out again.
  3. If the run out does not exceed the limit specification, install the brake disc after turning it 180° and then check the run out of the brake disc again.
  4. If the run out cannot be corrected by changing the position of the brake disc, replace the brake disc.
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