OEM Buick Rendezvous Brake Disc

Buick Rendezvous Brake Disc Parts and Q&A

• Brake Rotor
  89047768
  Q: How to replace the front brake disc on Buick Rendezvous?

  A:

  To replace the front Brake Disc, take the vehicle, support it and remove the tire and wheel assembly first. Mount a c-clamp onto the piston and compress it with the brake caliper just enough to permit the caliper slide away from the disc, and then take off the c-clamp. Support the brake caliper heavily using mechanic's wire or an equivalent whenever the piece is separated from the mount but is still attached to the flexible hydraulic brake hose to avoid damaging it. Then, take off the caliper bracket without removing the brake flexible hose bolt and remove the brake caliper and caliper mounting bracket as a single unit from the suspension knuckle. Ensure nothing will pull the hydraulic brake flexible hose. Mark the position of the Brake Disc on the wheel studs and then pry it off. Before installing the new disc, it is necessary to clean any rusts and contaminants from the hub/axle flange using the wheel hub resurfacing kit (J 42.450-A) and the Brake Disc using the rotor resurfacing kit (J 41013). Examine the mating surfaces to eliminate debris and insert the Brake Disc to the hub/axle flange with the matchmark to ascertain that it is correctly oriented. If necessary, measure the assembled fringe lateral runout (LRO) of the Brake Disc and modify for exceeding specifications. Replace the brake caliper and caliper bracket assembly to the suspension knuckle, then the tire and wheel assembly, and drop the vehicle. Lastly, when the Brake Disc has been refinished or replaced or if new Brake Pads have been mounted, burnish them with pads and discs.
• Rotor
  10434245
  Q: What Tools Are Required to Service and Repair the Brake Disc, and What Are the Steps Involved in the Refinishing Process on Buick Rendezvous?

  A:

  Service and repair of the brake disc requires multiple specific tools including The service requires the use of J 41013 Disc Resurfacing Kit and J 42450-A Wheel Hub Resurfacing Kit. J 41013 Disc Resurfacing Kit and J 42450-A Wheel Hub Resurfacing Kit. Standard brake system maintenance does not include disc brake disc refinishing and new discs should not receive any refinishing treatment. Refinishing operations should only be performed on discs which maintain sufficient thickness but present conditions including severe thickness irregularities and corrosion as well as cracking along with heat spots or discoloration or heavy scoring at levels higher than the allowable specifications. The first step involves surface cleaning with J 42450-A for hub/axle flanges and J 41013 for brake discs before refining. Prepare the brake disc mating surfaces for inspection while mounting the brake disc onto the brake lathe using clean attachments. Bring the cutting tools toward the lathe while it operates until they engage the disc friction surfaces while observing the correct witness mark for correct tool position. Adhere to disc refinishing procedures provided by the lathe manufacturer for measuring thickness between each cut. Any disc which achieves thickness beyond the allowed limit after refinished service should be substituted with a new disc. The recommended speed settings must be used during the finishing process with 120 grit aluminum oxide sandpaper on a non-directional tool but 150 grit aluminum oxide sandpaper with a block when without the tool. A cleaning process using denatured alcohol or an approved brake cleaner follows before measuring the assembled lateral runout (LRO) for disc specifications. The specification represents an acceptable threshold for which the LRO testing needs adjustments to comply.