CTS 2006-2007, CTS-V 2005-2007, DTS 2006-2007

Brake Disc (Rotor)

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Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Raise and support the vehicle.
  4.  
  5. Remove the tire and wheel assembly.
    NOTE
    Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is separated from its mount and the hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak.

  6.  
  7. Remove the brake caliper and the caliper mounting bracket as an assembly from the suspension knuckle and support the assembly with heavy mechanic's wire, or equivalent. Ensure that there is no tension on the hydraulic brake flexible hose.
  8.  
  9. Matchmark the position of the brake rotor to the wheel studs.
  10.  
  11. Remove the brake rotor mounting screw.
  12.  
  13. Remove the brake rotor.

    Click image to see an enlarged view

    Fig. Brake rotor, hub and mounting screw shown

  14.  

To install:


NOTE
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. Clean all mating and contact surfaces.
  2.  
  3. Inspect the mating surfaces of the hub/axle flange and the rotor to ensure that there are no foreign particles or debris remaining.
  4.  
  5. Install the brake rotor to the hub/axle flange.
  6.  
  7. Install the brake rotor mounting screw and tighten to 124 inch lbs. (14 Nm).
  8.  
  9. 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.
  10.  
  11. Install the brake caliper and the brake caliper bracket as an assembly to the suspension knuckle.
  12.  
  13. Install the tire and wheel assembly.
  14.  
  15. Lower the vehicle.
  16.  
  17. If the brake rotor was refinished or replaced, or if new brake pads were installed, burnish the pads and rotors.
  18.  

J55 & JL9 Brake Systems
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove the tire and wheel assembly.
  4.  
  5. Install a C-clamp over the body of the brake caliper, with the C-clamp ends against the rear of the caliper body and the outboard disc brake pad.
  6.  
  7. Using the C-clamp, compress the piston into the caliper bore just enough to allow the caliper to slide away from the rotor.
  8.  
  9. Remove the C-clamp.
    NOTE
    Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is separated from its mount and the hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak.

  10.  
  11. Remove the brake caliper and the caliper mounting bracket as an assembly from the suspension knuckle and support the assembly with heavy mechanic's wire, or equivalent. Ensure that there is no tension on the hydraulic brake flexible hose.
  12.  
  13. Mark the relationship of the rotor to the hub.
  14.  
  15. Remove the brake rotor.

    Click image to see an enlarged view

    Fig. View of (J55) brake system rotor



    Click image to see an enlarged view

    Fig. View of (JL9) brake system rotor

  16.  

To install:


NOTE
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. Use the J 42450-A cleaning kit to thoroughly clean any rust or corrosion from the mating surface of the hub/axle flange.
  2.  
  3. Using the J 41013 sanding disc to thoroughly clean any rust or corrosion from the mating surface and mounting surface of the brake rotor.
  4.  
  5. Inspect the mating surfaces of the hub/axle flange and the rotor to ensure that there are no foreign particles or debris remaining.
  6.  
  7. Install the brake rotor to the hub/axle flange. Use the matchmark made prior to removal for proper orientation to the flange.
  8.  
  9. Install the brake caliper bracket assembly. For the (J55) brake system, tighten the caliper bracket bolts to 181 ft. lbs. (246 Nm). For the (JL9) brake system tighten the caliper bracket bolts to 133 ft. lbs. (180 Nm).
  10.  
  11. Install the tire and wheel assembly.
  12.  
  13. Lower the vehicle.
  14.  
  15. If the brake rotor was refinished or replaced, or if new brake pads were installed, burnish the pads and rotors.
  16.  

 
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