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Hot Rods No Brake pedal

Discussion in 'The Hokey Ass Message Board' started by rooster32, Apr 21, 2017.

  1. rooster32
    Joined: Oct 13, 2015
    Posts: 6

    rooster32

    Ok I'm lost, I had to take the brake line off my 32' Roadster to make some repairs. When I returned to bleed the bakes last week I could not get a hard pedal. I could pump them up and have a decent pedal but than if I waited a couple minutes , strait to the floor. I've tried a new M/C . I bench bled it well. bled all four corners and have zero air coming out. I've gone through the car to make sure there are no air or fluid leaks . I did replace the Proportioning valve (screw in style) before I started this. and it is fully open. The car had excellent brakes prior to this. It has four wheel power disc. 7" booster and Corvette 1"M/C .Any thoughts?
     
  2. What calipers are you using in the rear? Do they have a built in parking brake?
     
  3. rooster32
    Joined: Oct 13, 2015
    Posts: 6

    rooster32

    GM metric , No parking brake . I use a drive shaft parking brake
     
  4. I would try a wet bleed to get out any trapped air. Run a tube into a jar of brake fluid and open the bleeder and pump the pedal. You can do one at a time or all four. If this does not work you may have a bad master. I had an OT Camaro that did this and it had the parking brake in the rear calipers.
     
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  5. d2_willys
    Joined: Sep 8, 2007
    Posts: 4,090

    d2_willys
    Member
    from Kansas

    If you have copper washers on the brake lines at the caliper, and have reused them, try replacing them. Had the same problem many years ago. Replaced them, no problems afterward.
     
  6. cshades
    Joined: Sep 2, 2011
    Posts: 339

    cshades
    Member
    from wi

    If you have the master under the floor(I assume you do)sometimes it is almost impossible to get all of the air out by just manually bleeding the system. I have a friend with a 35 ford, we replaced the front calipers, we went through about a gallon of brake fluid and still could not get a hard, consistent brake pedal. I went back to his shop the following weekend with my power pressure bleeder and within 5 minutes had a good solid pedal. The problem with his car and the pressure bleeder is the carpet covered the m/c hole and he had to remove his seat and carpet so we could put the pressure bleeder adapter on the m/c.
     

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