Symptoms of a bad brake booster...or is it the master cylinder?

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  • dandingo
    Grease Monkey
    • May 2008
    • 301

    #1

    Symptoms of a bad brake booster...or is it the master cylinder?

    So my brakes have been bad for awhile now and it's finally time to fix them. The symptoms are that when I brake the pedal feels decent but goes to the floor.

    If I pump them sometimes they're better but the pedal always goes to the floor. I've bled them on two different occasions and that didn't fix it so I believe it's the master cylinder.

    My dad thinks it could be the brake booster or possibly a vacuum leak. Any help would be GREATLY appreciated!
  • jlevie
    R3V OG
    • Nov 2006
    • 13530

    #2
    Sounds like a bad master cylinder to me. A failed brake booster typically results in a very hard pedal form lack of boost.
    The car makes it possible, but the driver makes it happen.
    Jim Levie, Huntsville, AL

    Comment

    • dandingo
      Grease Monkey
      • May 2008
      • 301

      #3
      Originally posted by jlevie
      Sounds like a bad master cylinder to me. A failed brake booster typically results in a very hard pedal form lack of boost.
      Thanks man, I concur. I was 99% sure but another opinion is always appreciated.

      Comment

      • Bob87
        Advanced Member
        • Mar 2008
        • 127

        #4
        brake

        Dan, if you need a master, ive got one just buy the repair kit

        bobby
        Last edited by Bob87; 01-08-2009, 11:14 AM. Reason: wrong spelling

        Comment

        • dandingo
          Grease Monkey
          • May 2008
          • 301

          #5
          Originally posted by Bob87
          Dan, if you need a master, ive got one just buy the repair kit

          bobby
          You've got one or are you saying I should just buy a repair kit? Where can I get a repair kit from and is it worth it to rebuild it or is it a pain in the ass?

          Comment

          • kev.skyline
            Noobie
            • Dec 2008
            • 19

            #6
            Originally posted by dandingo
            You've got one or are you saying I should just buy a repair kit? Where can I get a repair kit from and is it worth it to rebuild it or is it a pain in the ass?
            theyre real handy to repair, just make sure you put the seals in the right way:pimp:

            Comment

            • dandingo
              Grease Monkey
              • May 2008
              • 301

              #7
              Originally posted by kev.skyline
              theyre real handy to repair, just make sure you put the seals in the right way:pimp:
              But do you have to hone out the inside??

              Comment

              • Bob87
                Advanced Member
                • Mar 2008
                • 127

                #8
                brake

                Originally posted by dandingo
                You've got one or are you saying I should just buy a repair kit? Where can I get a repair kit from and is it worth it to rebuild it or is it a pain in the ass?

                Yes, Autozone, it's an easy fix, you can pre bleed the master before you install it.

                Comment

                • dandingo
                  Grease Monkey
                  • May 2008
                  • 301

                  #9
                  Awesome, thanks for the info Bob. Where would I pick up the rebuild kit?

                  Originally posted by Bob87
                  Yes, Autozone, it's an easy fix, you can pre bleed the master before you install it.

                  Comment

                  • mintscorpion
                    Member
                    • Jan 2009
                    • 91

                    #10
                    Originally posted by jlevie
                    sounds like a bad master cylinder to me. A failed brake booster typically results in a very hard pedal form lack of boost.
                    +1
                    -Matt

                    1986 BMW 325
                    sigpic

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