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Front Brake Disc Inspection: Runout

WARNING: This page is about a different car, the 2009 Acura MDX, 2008 Acura MDX, and 2007 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise the front of the vehicle, and support it with safety stands in the proper locations (see LIFT AND SUPPORT POINTS ).
  2. Remove the front wheels.
  3. Remove the brake pads (see REPLACEMENT  ).
  4. Inspect the brake disc surface for damage and cracks. Clean the brake disc thoroughly, and remove all rust.
  5. Install suitable flat washers (A) and wheel nuts (B), and tighten the wheel nuts to the specified torque to hold the brake disc securely against the hub.
    Fig 1: Flat Washers And Wheel Nuts With Torque Specification
    G05486802Courtesy of AMERICAN HONDA MOTOR CO., INC.
  6. Set up the dial gauge against the brake disc as shown, and measure the runout at 10 mm (3/8 in.) from the outer edge of the brake disc.

    Brake disc runout: 

    Service limit: 0.04 mm (0.0016 in.) 

  7. If the brake disc is beyond the service limit, refinish the brake disc with a commercially available on-car brake lathe.

    Max. refinishing limit: 26.0 mm (1.02 in.) 

    NOTE:
    • If the brake disc is beyond the service limit for refinishing, replace it (see FRONT BRAKE DISC REPLACEMENT  ).
    • A new brake disc should be refinished if its runout is greater than 0.04 mm (0.0016 in.).
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