How bleed the brakes with ABS?

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  • Tom_
    S2Forum Extremist
    • Oct 2007
    • 1301
    • Country: Czech Republic

    #1

    How bleed the brakes with ABS?

    I changed brake lines and hoses,than put new brake fluid and bleed the brakes.Yesterday during test drive,when i brake the brake pedal is going too low and sometimes i heard a ABS . Its any differences to bleed the brakes with and without ABS?The car is cq20v.

    Thank you
    Last edited by Tom_; 9 August 2015, 17:33.
    Audi Coupe Quattro 2.3 20V
  • Avantus
    S2Forum Maniac
    • Sep 2007
    • 941
    • Country: Belgium

    #2
    you should start at the wheel the furthest away from the ABS. Then other rear side, front furthest, and then nearest.

    And best to go round 2-3 times to make sure.

    Comment

    • Tom_
      S2Forum Extremist
      • Oct 2007
      • 1301
      • Country: Czech Republic

      #3
      i do that,but its no good...
      Audi Coupe Quattro 2.3 20V

      Comment

      • Henkjan
        S2Forum Extremist
        • Aug 2003
        • 1705
        • Country: Netherlands

        #4
        how did you bleed? did you use a pressure source such as the ezbleed, or the old way using your foot on the pedal?

        Comment

        • Tom_
          S2Forum Extremist
          • Oct 2007
          • 1301
          • Country: Czech Republic

          #5
          i am using a foot on the pedal....
          Audi Coupe Quattro 2.3 20V

          Comment

          • stocious
            S2Forum Maniac
            • Jul 2012
            • 838
            • Country: Ireland

            #6
            just a thought , did you have your master cylinder removed whilst you were doing all the work ? and if so did you bleed it on a bench before fitting to the car.
            1991 S2 3B Coupe, KW v1, solid sub frames, poly bushed, chipped, about 260 ish

            Comment

            • Tom_
              S2Forum Extremist
              • Oct 2007
              • 1301
              • Country: Czech Republic

              #7
              No master cylinder was fitted all the time.I only get out the brake fluid contanier to flush the rest of the fluid,what was there
              Audi Coupe Quattro 2.3 20V

              Comment

              • UrS4boy
                S2Forum Obsessed
                • Feb 2006
                • 11859
                • Country: Canada

                #8
                Originally posted by Tom_
                i am using a foot on the pedal....
                Then you need two people or one-way valves.
                RS2'd 93 UrS4 5 spd sedan
                94 UrS4 V8 6 spd manual avant

                Comment

                • Tom_
                  S2Forum Extremist
                  • Oct 2007
                  • 1301
                  • Country: Czech Republic

                  #9
                  yes,i did it with my mate
                  Audi Coupe Quattro 2.3 20V

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                  • Christophski
                    S2Forum Possessed
                    • Mar 2009
                    • 3632
                    • Country: United Kingdom

                    #10
                    push the peddle, open the nipple, push peddle to floor slowly, do nipple up, pump peddle 10 times, then repeat the process.

                    Repeat the process each time remembering to pump the peddle 10 times gently between each go. i have never found this to fail me or my brother who is a mechanic.

                    Comment

                    • UrS4boy
                      S2Forum Obsessed
                      • Feb 2006
                      • 11859
                      • Country: Canada

                      #11
                      Originally posted by Christophski
                      push the peddle, open the nipple, push peddle to floor slowly, do nipple up, pump peddle 10 times, then repeat the process. Repeat the process each time remembering to pump the peddle 10 times gently between each go. i have never found this to fail me or my brother who is a mechanic.
                      Strongly suggest that "push peddle to floor" is TOO FAR. By doing so, you will push the piston and the seal past their normal area of action, past what might be a "lip" in the cylinder, potentionally damaging the seal, necessitating a rebuild or replacement. Better to limit travel by placing some block of wood on the foot board behind the peddle.
                      RS2'd 93 UrS4 5 spd sedan
                      94 UrS4 V8 6 spd manual avant

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                      • Christophski
                        S2Forum Possessed
                        • Mar 2009
                        • 3632
                        • Country: United Kingdom

                        #12
                        Or do the above I have never done that but maybe I should

                        Comment

                        • K Simmonds
                          S2Forum Zealot
                          • Dec 2007
                          • 7627
                          • Country: Wales

                          #13
                          Originally posted by UrS4boy
                          Better to limit travel by placing some block of wood on the foot board behind the peddle.
                          That's a really good idea, I'm going to do that from now on.

                          OP, I'd try pressure bleeding the system in the same order.
                          1990 B3 2.0 80 quattro.
                          1992 C4 2.8 Avant quattro
                          1994 MTM RS2.
                          1998 B5 TDI quattro Sport.
                          2000 B5 TQS.

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                          • Fat Audi 80
                            Super Moderator
                            • Jan 2004
                            • 10547
                            • Country: England

                            #14
                            Never had a problem bleeding the an ezibleed pressure bleeding system. HTH
                            The Perfectionist
                            sigpic
                            Audi Class Concours winner Stoner Park 2014, ADI Concours D'Elegance Class Winner 2008, Runner up 2014. Winner, S2Forum Show'n'Shine Billing 2006 & 2008.

                            Comment

                            • UrS4boy
                              S2Forum Obsessed
                              • Feb 2006
                              • 11859
                              • Country: Canada

                              #15
                              Originally posted by Avantus
                              you should start at the wheel the furthest away from the ABS. Then other rear side, front furthest, and then nearest. And best to go round 2-3 times to make sure.
                              And don't forget the clutch slave which uses the same fluid as the brakes. Do this last.



                              Last edited by UrS4boy; 24 July 2013, 18:27.
                              RS2'd 93 UrS4 5 spd sedan
                              94 UrS4 V8 6 spd manual avant

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