Bleeder screws won't seal.

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Vortec94

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Jun 7, 2015
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I replace my master cylinder, wheel cylinders and hoses (not hard lines) recently and cannot get a firm pedal no matter how many times i bleed the system.

Yesterday i switched from conventional bleeding to vacuum bleeding and found that even with the rear bleeders closed snugly, they both appear to be leaking air. Clean threads, good seal on the vac pump.

it's really annoying on brand new acdelco cylinders. Obviously, I'm going to try a pair of new bleeders. You guys ever see this before?
 
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