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Home >> Chevrolet >> 2007 >> Impala SS >> Repair and Diagnosis >> External Pages >> Different car >> Section 355 (Disc Brake System) >> Repair Instructions >> Brake Rotor Assembled Lateral Runout Correction - Indexing >> Indexing Procedure

Indexing Procedure

WARNING: This page is about a different car, the 2006 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying J 45101-100 & Lug Nut
    GM891797Courtesy of GENERAL MOTORS CORP.
  1. Remove the J 45101-100  and the lug nuts that were installed during the assembled LRO measurement procedure. See Special Tools .
  2. Inspect the mating surface of the hub/axle flange and the brake rotor to ensure that there are no foreign particles or debris remaining.
  3. Index the brake rotor in a different orientation to the hub/axle flange.
  4. Hold the rotor firmly in place against the hub/axle flange and install one of the J 45101-100  (1) and one lug nut (2) onto the upper-most wheel stud. See Special Tools .
  5. Continue to hold the rotor secure and tighten the lug nut firmly by hand.
    6. Fig 2: Installing All J 45101-100s & Lug Nuts
    GM891801Courtesy of GENERAL MOTORS CORP.
  6. Install the remaining J 45101-100  and lug nuts onto the wheel studs and tighten the nuts firmly by hand in a star-pattern. See Special Tools .
  7. Using the J 39544-KIT  or equivalent, tighten the lug nuts in a star-pattern to specification, in order to properly secure the rotor. See Special Tools . Refer to Tire and Wheel Removal and Installation .
  8. Measure the assembled LRO of the brake rotor. Refer to Brake Rotor Assembled Lateral Runout Measurement .
  9. Compare the amount of change between this measurement and the original measurement.
  10. If this measurement is within specifications, proceed to step 14.
  11. If this measurement still exceeds specifications, repeat steps 1-9 until the best assembled LRO measurement is obtained.
  12. Matchmark the final location of the rotor to the wheel studs if the orientation is different than it was originally.
  13. If the brake rotor assembled LRO measurement still exceeds the maximum allowable specification, refer to Brake Rotor Assembled Lateral Runout Correction .
  14. If the brake rotor assembled LRO is within specification, install the brake caliper and depress the brake pedal several times to secure the rotor in place before removing the J 45101-100  and the lug nuts. See Special Tools .
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