This tool not only provides the pushing force, but also screws the piston back in at the same time.Ĭaliper tool set from Harbor Freight Tools. This can be accomplished by using a large C-clamp and channel lock pliers or by buying the caliper tool set for disc brakes from Harbor Freight Tool Company. It must be screwed in using a clockwise motion with pressure on the piston. There are several ways to get the piston back in the caliper. Piston has not been pushed back in cylinder yet. If removing rotors to replace them or to have them turned, remove the two carrier retaining bolts (Figure 1, Item 4) using an 8mm allen head socket. Do not allow it to hang from the brake line! Have wire ready to tie it up or rest it on the suspension arm. Remove caliper assembly by lifting it up and off. Use a 15 mm open end wrench to hold the nut from spinning while loosening the bolt just inboard of it. Using a 13 mm socket or wrench, loosen the bolt just inboard of it (Figure 1, item 1). Using a 15 mm open ended wrench, hold the nut shown in the picture below (part of Item 3, Figure 1). Raising the entire rear end makes the job much simpler and safer. Jack the car up and put the rear end up on jack stands. Take lug nut caps off and loosen lug nuts. It identifies the major brake components. The following picture is from the Bently manual.
Large C-clamp to push the piston back in the caliper.8 mm Allen wrench to fit to a 3/8" rachet drive (only needed if replacing rotors).This procedure is applicable to all models. When the brake pad backing plate comes in contact with the rotor and metal to metal contact is heard, you will know it's time to do the rears!Īll A8's and S8's had the same rear brakes. If the rear brake pads are worn down, the fronts are probably not far behind. Plus, you don't have to get the rotors turned, which can be a real hassle if it is not done correctly or you don't have two vehicles. This will prevent you from having to do the job again anytime soon. Consider replacing both if your rotors have 50,000 miles or more on them.
Replacement of rear rotors and pads is an easy task, even if you've never done it before.
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