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Date: Thu, 24 Mar 2005 16:36:31 -0700
From: Mike <mteeplesnospam.net>
Subject: Re: 9-3 brake rotor


I have worked on several ABS systems from 3-4 different manufacturers and have never been aware of an ABS system that would have a problem with backing off the caliper piston. Most if not all ABS systems are a magnetic/electronic sensor picking up off the rotor and controlling the fluid at the master cylinder point, not at the caliper point. If that is correct, then compressing the caliper piston shoud have no ill effects on the ABS system. Please correct my misunderstanding. \ Mike Teeples / SLC, Utah > >Under no circumstances should you push the caliper piston back into the >bore - there is definitely the potential of damage to the ABS. > >The best solution is to crack open the bleeder screw (not the brake line) >and slowly push the piston in with a C-clamp. Be sure to use something >between the clamp and the piston, such as a piece of metal. On some >vehicles, you could even use the old brake pad. Another option is to use a >large socket centered inside of the caliper. Be sure to close off the >bleeder prior to assembly. > >After you've reassembled the brakes, press down slowly on the brake pedal, >about 1/2 to 3/4 of the travel, as many times as necessary to restore proper >pedal. Top off brake fluid as needed. Also, this is an excellent opportunity >to replenish the brake fluid to the front wheels. Use a syringe to draw out >as much old fluid from the master cylinder as possible, fill with new fluid, >and then bleed each front brake until new fluis comes out. The use of a >piece of clear plastic tubing attached to the bleeder screw allows you to >observe the color of the fluid, as well as minimizing mess. > >doug > >

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