SOS: testing clutch slave cylinder

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  • lifeiskaos
    E30 Mastermind
    • Dec 2007
    • 1709
    #1

    SOS: testing clutch slave cylinder

    alright guys, im trying to troubleshoot my failed clutch system. im on campus right now, and i forgot my bentley at home... but i have the slave cylinder out right now (getting weird looks in the parking lot) and i dont know how to test it... the piston seems to have a LOT of play, both side to side and in and out. i dont know what a good one is supposed to be like, but at least mine is bone dry and not leaking...

    also, when i stick my pinky in the tranny (where the slave piston pushes) something is loose and i can wiggle it a little bit. is that normal?

    background info: car stalled in gear on the freeway because my megasquirt came unplugged. then no clutch.
    Tags: None
    • NC325iC
      R3V OG
      • Mar 2004
      • 6565
      #2
      replace it
      Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.

      Originally posted by TimKninja
      Im more afraid of this thread turning into one of those classic R3v moments, where Pizza gets delivered.

        Comment

        • bmwpower
          E30 Mastermind
          • Jul 2007
          • 1556
          #3
          The piston on a the slave cylinder is supposed to have a little play side to side. When you stick your pinky in the trans, you're hitting the clutch release arm. That, too, can wiggle a little bit as there is some play with the release bearing and the arm.

          http://img.eautopartscatalog.com/live/I400118305OES.JPG


          You likely have air in the system somewhere. Might be the brake master cylinder - check that as well. If you are able to take out the slave, you should have room to bleed the system, BUT you must put the slave back in prior to bleeding as you will damage it.
          89 325is track project / 05 x5 / 99 M3
          E30 stuff for sale | Parts I'm looking for

            Comment

            • lifeiskaos
              E30 Mastermind
              • Dec 2007
              • 1709
              #4
              our clutches are self bleeding, and air wouldnt have gotten in the system so fast. i dont believe it was a coincidence that something blew when my car stalled, but i just ordered a new master, so hopefully that'll fix everything. thanks

                Comment

                • bmwpower
                  E30 Mastermind
                  • Jul 2007
                  • 1556
                  #5
                  Originally posted by lifeiskaos
                  our clutches are self bleeding, and air wouldnt have gotten in the system so fast. i dont believe it was a coincidence that something blew when my car stalled, but i just ordered a new master, so hopefully that'll fix everything. thanks
                  Hmm....Isn't that the reason there is a bleeder on the slave?

                  FYI, similar thing happened to my car driving to work. Pedal just went to the floor and never came back up. I believe it was replacing the master that fixed everything.

                  Good luck. Hope it fixes it.
                  89 325is track project / 05 x5 / 99 M3
                  E30 stuff for sale | Parts I'm looking for

                    Comment

                    • erik325i
                      No R3VLimiter
                      • Jan 2005
                      • 3567
                      #6
                      Originally posted by lifeiskaos
                      our clutches are self bleeding, and air wouldnt have gotten in the system so fast.
                      The master cylinder is self bleeding, but not the slave.

                      Erik

                        Comment

                        • lifeiskaos
                          E30 Mastermind
                          • Dec 2007
                          • 1709
                          #7
                          Originally posted by erik325i
                          The master cylinder is self bleeding, but not the slave.

                          Erik
                          thanks for clarifying

                            Comment

                            • tonytony
                              Knee deep in poopie
                              • Jan 2004
                              • 3498
                              #8
                              the slave can still be dry and not leaking, but still messed up. replace it

                                Comment

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