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No fluid coming out of rear caliper.

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    No fluid coming out of rear caliper.

    I just replaced part of the brake hard-line running to the rear proportioning valve because of a blowout. I then when on with the normal brake bleeding for the rear right caliper and was able to get the bubbles out. No fluid came out of the rear left. I then asked some knowledgeable people and they said that it was likely the caliper. When I went to replace the caliper and pulled the soft line off the old caliper, only a couple drops of fluid came out. What should I do next?

    #2
    Try pushing on your brake pedal harder.
    Current:
    1989 325i
    1988 M3
    1987 325ic
    Past:
    2001 330ci
    2001 M3

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      #3
      Haha I tried. When I tried bleeding it and opened the bleeder the pedal didn't move. I feel on that car if i push to hard another thing is just gonna brake.

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        #4
        Originally posted by CFeld View Post
        If i push to hard another thing is just gonna brake.
        Funny.

        First, try compressing the piston and then try to bleed again. If that doesn't work go forward to the next connection in the system and check for fluid. Once you find fluid tap the line all the way along to the problem caliper in an effort to break up the clog. Also remember that sof lines can collapse and totally jam up fluid flow.

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          #5
          Try a power bleeder. The kind that hooks up to an air compressor. I was having a similar issue on my gf's Explorer but a power bleeder just forced it right through.
          AWD > RWD

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            #6
            I tried compressing the piston already, I just ordered a full set of soft lines. This is the first time the car has run in over 12 years so I figure this is more of preventive maintenance.

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              #7
              We have been seeing a lot of clogged lines lately on e30's. The rubber is disintegrating and the pieces are stopping them up. One was so bad, compressed air nor hydraulic pressure wouldn't release them, hard lines needed replaced.
              john@m20guru.com
              Links:
              Transaction feedback: Here, here and here. Thanks :D

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                #8
                Originally posted by Kershaw View Post
                Try a power bleeder. The kind that hooks up to an air compressor. I was having a similar issue on my gf's Explorer but a power bleeder just forced it right through.
                Pedal pressure will be much higher then what a power bleeder uses.

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                  #9
                  Originally posted by AndrewBird View Post
                  Pedal pressure will be much higher then what a power bleeder uses.
                  ....or even compressed air...
                  john@m20guru.com
                  Links:
                  Transaction feedback: Here, here and here. Thanks :D

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                    #10
                    I just replaced soft line that runs to the caliper and internally it was in good condition. I have new soft lines for the other rear ones, but I'm starting to think that it's just the proportioning valve since the right side is fine its just the left.

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                      #11
                      The proportioning valve feeds both sides, the front aft hydraulic line is a single tube that runs from the valve to the rear T-piece. The valve is located under the brake booster.

                      That isn't saying the valve couldn't do with being replaced if it's the original but it wouldn't be the cause of 1 caliper not getting fluid.

                      What do your hard lines look like on that side ? Particularly the line off the T-piece, they can corrode from the inside and block the tube.

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                        #12
                        The hard lines look pretty good, I meant the proportioning block (the T thing). None of the lines look that bad, but somewhere from the t to the caliper there is a clog.

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                          #13
                          Ended up being the left side hardline and the right side hardline broke off while working on it. I ended up using one of the front hoses to run from the t-block to the hardline on the left side.

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