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Front Brake Disc Run Out Check

WARNING: This page is about a different car, the 2007 Kia Optima, 2007 Kia Magentis, 2006 Kia Optima, and 2006 Kia Magentis. However, it is still accessible from the selected car via links, so may be relevant.
  1. Place a dial gauge about 5mm (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 Disc Run Out
    G04805844Courtesy 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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