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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 115 (Disc Brake System (HEV)) >> Rear Disc Brake >> Repair Procedures >> Inspection >> Rear Brake Disc Runout Check

Rear Brake Disc Runout Check

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

    Brake disc runout 

    Limit: 0.03 mm (0.00118 in.) or less (new one)

    Fig 1: Measuring Disc Runout
    G10589306Courtesy of HYUNDAI MOTOR AMERICA
  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 exceeds the limit specification, install the brake disc after turning it 180° and 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.