Bleeder Valve...........Leaking

Discussion in '1970 - 1973 Specific' started by Smokey15, Sep 24, 2020.

  1. Smokey15

    Smokey15 Veteran Member

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    The bleeder valve of the brake proportioning valve in my wife's '71 Z/28 leaks through the hole in the middle. . Can I put a plug in place of the cover? BTW, Using Dot 5 (silicone) fluid.
     
  2. Jodi

    Jodi Veteran Member

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    Stock PV?
    If I'm not mistaken, I believed what your referring to is the Brake light warning switch.
    Why not just replace it?
     
  3. mallard

    mallard Veteran Member

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    Picture?
     
  4. flowjoe

    flowjoe Moderator Staff Member Lifetime Gold Member

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    Yeah, need photos or something so we all know that we are talking about the same thing.

    Did you just replace the previous non-DOT 5 brake fluid with DOT 5? Or did you start out a wholly new system using DOT 5? I’ve read and been told numerous times that you can’t change over a system to DOT 5 without starting from scratch. I’ve no personal experience so my info may be in error. The sort of thing your experiencing is what I have read and been told can happen when a brake system is switched over.
     
  5. Smokey15

    Smokey15 Veteran Member

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    Started from scratch...........this time. I have converted several systems with zero problems.
    It is not the brake warning light switch. This is located on the 'engine' side of the proportioning valve. I did 'cure' the problem. I bought a 10-32 threaded plug, tapped the hole in it and plugged it. I had to nip 1/8" off the 'rod' that extended through it.
     
  6. xten

    xten Veteran Member

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    Glad to hear you got it fixed Smokey. We've done a few DOT 5 too with zero problems. We just drained, flushed refilled and bled. My truck traps ~120 and no leaks, fade or boiling. Kid is 160+ mph, no problems either. Both are street driven too.
     
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