Brake Problem
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, Brake Problem in Past Cadillac Vehicle Discussion; my breaks began to go to the floor .i added fluid still goes the floor where the fluid go .i ...
  1. #1
    old tin man is offline Cadillac Owners Member
    Automobile(s): 92 deville
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    Brake Problem

    my breaks began to go to the floor .i added fluid still goes the floor where the fluid go .i have checked for leak tires and mastercylinder any idea thanks

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  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with floor shift)
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    Re: breaks



    If the pedal goes to the floor and there are no external leaks, the master cylinder is leaking brake fluid internally past the piston. Time for a new master cylinder.

    P.S.
    I retitled your thread.

  4. #3
    old tin man is offline Cadillac Owners Member
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    Re: Brake Problem

    but wherse the fluid going

  5. #4
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with floor shift)
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    Re: Brake Problem

    No where. It is staying inside the MC, but passes around the piston, thus the pedal slowly sinks to the floor. Imagine an engine with pistons, but no piston rings. Where would the air being compressed in the cylinder go?

  6. #5
    old tin man is offline Cadillac Owners Member
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    Re: Brake Problem

    i had to add fluid

  7. #6
    dennis93coupe's Avatar
    dennis93coupe is offline Cadillac Owners Connoisseur
    Automobile(s): 1993 Coupe Deville 2006 XLR Infrared, Ebony
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    Re: Brake Problem

    If you have to keep adding fluid, then you should see it leaking onto the ground somewhere. Did you look around the ABS valve? Pull the vacuum line off of your brake booster, is it wet from fluid or dry?

  8. #7
    old tin man is offline Cadillac Owners Member
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    Re: Brake Problem

    you talking about the hose on the side its about 3/4 black hose it had fluide in it... thanks for the help

  9. #8
    dennis93coupe's Avatar
    dennis93coupe is offline Cadillac Owners Connoisseur
    Automobile(s): 1993 Coupe Deville 2006 XLR Infrared, Ebony
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    Re: Brake Problem

    Yeah that's it. Sounds like you need to replace that booster and master cylinder.

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