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Rear 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 rear of the vehicle, and support it with safety stands in the proper locations (see LIFT AND SUPPORT POINTS ).
  2. Remove the rear wheels.
  3. Remove the brake pads (see REAR BRAKE PAD INSPECTION AND REPLACEMENT  ).
  4. Inspect the brake disc/drum surface for damage and cracks. Clean the brake disc/drum 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/drum securely against the hub.
    Fig 1: Brake Disc/Drum Surface For Damage And Cracks With Torque Specification
    G05486823Courtesy of AMERICAN HONDA MOTOR CO., INC.
  6. Set up the dial gauge against the brake disc/drum as shown, and measure the runout at 10 mm (3/8 in.) from the outer edge of the brake disc/drum.

    Brake disc/drum runout: 

    Service limit: 0.04 mm {0.0016 in.) 

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

    Max. refinishing limit: 9.0 mm (0.35 in.) 

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