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Disc Rotor RUNOUT Check

WARNING: This page is about a different car, the 2012 Subaru Outback and 2012 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check the front hub unit bearing for free play and runout before the inspection of disc rotor runout limit. Refer to REAR HUB UNIT BEARING .
  2. Tighten the wheel nuts to secure disc rotor.
  3. Set a dial gauge 10 mm (0.39 in) inward from the disc rotor outer circumference, and check the disc rotor runout while rotating the disc rotor.

    Disc rotor runout limit: 0.05 mm (0.0020 in) 

    Fig 1: Checking Disc Rotor Runout
    G07915614Courtesy of SUBARU OF AMERICA, INC.
  4. If the runout limit is exceeded in the inspection, replace the disc rotor.
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