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Caliper question (Fluid in piston boot)?

This is a discussion on Caliper question (Fluid in piston boot)? within the General Help forums, part of the LSx Technical Help Section category; I was driving the other day, nothing out of the ordinary, and the brake started catching every rotation (within me ...

  1. #1
    Junior Member nyarsulik's Avatar
    Join Date
    Feb 2006
    Kansas City

    1999 Pontiac Trans Am

    Caliper question (Fluid in piston boot)?

    I was driving the other day, nothing out of the ordinary, and the brake started catching every rotation (within me actually on the brakes).

    Took everything apart that night and noticed that one of the pistons had a bunch of brake fluid inside of its boot, kind of bubbling out, definitely nothing like I have seen before. Has anyone else seen this?

    I compressed both pistons and tinkered with the boot until I got the excess brake fluid to come out (it came out where the piston touches the boot).

    Haven't tried to drive it yet.

    With the wheel back on and still on a stand, I spun the wheel around and it still slightly catches on one spot. Could it be a warped rotor?

  2. #2
    Moderator Firebirdjones's Avatar
    Join Date
    May 2006
    Sounds like a leaky caliper piston. Time to rebuild or buy some new ones.

  3. #3
    Member Numba1TA's Avatar
    Join Date
    Feb 2008
    Missouri, STL

    1999 Trans Am WS6 A4

    Check your axels maybe its bent i have a bent one now and does the same thing

  4. #4
    Member DaddySS's Avatar
    Join Date
    Oct 2005
    Bergen Co. NJ

    2000 Camaro SS Conv.

    Sounds like you have two problems; warped rotor and bad caliper. The caliper should absolutely not leak fluid into the boot.

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