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Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 758 (Disc Brake System) >> Repair Instructions >> Front Brake Rotor Replacement (With RPO LNF) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Disc Brake Rotor
    GM1989062Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Whenever the brake rotor has been separated from the hub/axle flange, any rust or contaminants should be cleaned from the hub/axle flange and the brake rotor mating surfaces. Failure to do this may result in excessive assembled lateral runout (LRO) of the brake rotor, which could lead to brake pulsation.
  1. Using the J 42450-A  , thoroughly clean any rust or corrosion from the mating surface of the hub/axle flange. See Special Tools .
  2. Using the J 41013  , thoroughly clean any rust or corrosion from the mating surface and mounting surface of the brake rotor. See Special Tools .
  3. Inspect the mating surfaces of the hub/axle flange and the rotor to ensure there are no foreign particles or debris remaining.
  4. Install the brake rotor (1) to the hub. Use the matchmark made prior to removal for proper orientation to the flange.
  5. If the brake rotor was removed and installed as part of a brake system repair, measure the assembled lateral runout (LRO) of the brake rotor to ensure optimum performance of the disc brakes. Refer to Brake Rotor Assembled Lateral Runout Measurement .
  6. If the brake rotor assembled LRO measurement exceeds the specification, bring the LRO to within specifications. Refer to Brake Rotor Assembled Lateral Runout Correction .
    7. IMPORTANT: If reusing the brake caliper bolts the threads of the bolts and the threads of the knuckle mounting holes must be free of residue and debris prior to application of threadlocker in order to ensure proper adhesion and fastener retention.
  7. Prepare the bolts and the threaded holes for assembly:
    • Thoroughly clean the residue from the bolt threads by using denatured alcohol or equivalent and allow to dry.
    • Thoroughly clean the residue from the threaded holes by using denatured alcohol or equivalent and allow to dry.
  8. Apply threadlocker GM P/N 12345493 (Canadian P/N 10953488), or equivalent to 2/3 of the threaded length of the caliper bolts. Ensure that there are no gaps in the threadlocker along the length of the filled area of the bolts.
  9. Allow the threadlocker to cure approximately 10 minutes before installation.
    10. Fig 2: Locating Brake Caliper-To-Knuckle Mounting Bolts
    GM1349659Courtesy of GENERAL MOTORS CORP.
  10. Install the brake caliper assembly to the steering knuckle.
    11. NOTE: Refer to Fastener Notice .
  11. Install the brake caliper bolts (1).

    Tighten:  Tighten the bolts to 130 N.m (96 lb ft).

  12. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
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