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Brake Bleeding Advice Needed

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Old Dec 3, 2025 | 08:43 PM
  #81  
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MelWff
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Originally Posted by 76Murf
Hi FWillson, I came across this post as I'm having the same problem on my 1976 Corvette. New back calipers and pads but can't seem to bleed the system to a hard pedal. The difference between our cars is mine has power brakes. I have a hard pedal when the car is not running. As soon as I crank the car, the pedal goes to the floor and won't pump up. I've run 2 quarts of brake fluid through the back 2 new calipers the old fashioned way with someone pumping and holding the pedal for me. I then purchased a Motive power bleeder and tried that. Nothing has worked so I'm wondering if the master cylinder somehow got screwed up when I replaced the calipers. Did you ever find a solution to your problem? I've bled the brakes on many many cars and have never had this problem and it's driving me crazy! Thanks Jay
If you have the original master and had someone press the pedal to the floor while bleeding the seals in the master probably are damaged from moving in to areas of the master cylinder bore that are possibly corroded.
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Old Dec 3, 2025 | 10:15 PM
  #82  
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I'm going to bench bleed the MC on there tomorrow and if that doesn't work I'm going with a new one. Thanks for the reply!
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