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by sweetnoffin85 on October 31st, 2009

sweetnoffin85

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I have a 1979 Corvette And I keep gettin Air in my Break lines I have RePlaced Everything on them Put over 2000 dollars In just the Breaks ANd im still gettin Air in the Lines Why is this

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  • by vinc3nt on October 31st, 2009

    vinc3nt

    There are several possibilities:
    1. After bleeding the brakes, brake pedal is spongy and performance is poor. Air trapped in the system somewhere or sometimes the routing of brake lines does produces a trap. Also a flex-hose may be weak and expands under pressure. Sometimes the sequence of bleeding must be changed.
    2. After bleeding the brakes, brake pedal is hard and braking performance is good, but after some period of time (a day or weeks) the pedal becomes spongy. This suggests that there is air entering somewhere, usually due to a flaw in a flex-hose.
    3. If after bleeding brakes all is good until you use the brakes hard then you have cooked the fluid and need high temp fluid. This might also happen if a brake line is too close to an exhaust header.

    Comments

    • if the air is getting trapped the line how can you fix that. the lines have been bled numerous times.

      sweetnoffin85

      by sweetnoffin85 on November 30th, 2009

    • So by your comment, I understand that you have tried alternative sequences for bleeding the brakes and the brake pedal remains spongy. There may have been a replaced part that was oriented wrong. If you paid someone to install the parts that person should be responsible for this trouble shooting effort. If you did the job, it is time to get professional help.

      vinc3nt

      by vinc3nt on November 30th, 2009

    • did you replace the master cylinder and did you bench bleed it first, also if you replaced the calipers make sure you bang on them with a rubber mallet to get the trapped air bubbles to the top or the caliper so that they bleed out properly.

      Little Red 1

      by Little Red 1 on February 17th, 2010

    3 comments | Post one | Permalink

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