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Thread: Bleeding clutch question

  1. #1
    Join Date
    Sep 2008
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    Sandy, Oregon
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    2002 330Ci, 1995 325is

    Bleeding clutch question

    I have a quick question. I'm replacing my ABS pump unit because of the trifecta. I know I will have to power bleed the brakes and run the pump, but do I have to also bleed the clutch? I think most of the information I'm seeing is for people without manual transmissions. Will I get air in the clutch line when I unhook the fluid lines from the ABS pump housing? Any help would be appreciated.
    Last edited by curry; 01-30-2018 at 12:03 PM. Reason: spellling

  2. #2
    Join Date
    Mar 2015
    Location
    west chicago il
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    01 E46 330i 5sp man spor
    What codes do you get? Usually it is the module only (black electronic part) that fails. No need to replace the entire unit or open any brake lines. You can send it out for repair and get your same module back which also eliminates the need for coding/programming to match another one to your car. The clutch master cylinder gets fluid from the brake master reservoir so there should be no issue there.

    Sent from my SAMSUNG-SM-G870A using Tapatalk

  3. #3
    Join Date
    Jul 2011
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    Arlington, VA
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    2018 BMW M240i
    The only thing the clutch and the brake master cylinders share is the brake fluid reservoir. However, bleeding the clutch is straight forward: pump the clutch pedal.

  4. #4
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    Sep 2008
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    2002 330Ci, 1995 325is
    It's the one under the brake master cylinder. It's also the Ate one that can't be repaired. The codes indicate that it is toast.
    Quote Originally Posted by randy72877 View Post
    What codes do you get? Usually it is the module only (black electronic part) that fails. No need to replace the entire unit or open any brake lines. You can send it out for repair and get your same module back which also eliminates the need for coding/programming to match another one to your car. The clutch master cylinder gets fluid from the brake master reservoir so there should be no issue there.

    Sent from my SAMSUNG-SM-G870A using Tapatalk

  5. #5
    Join Date
    May 2010
    Location
    Winston-Salem, NC
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    66
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    1987 BMW 325e
    I don't think bleeding the clutch is that simple. I've been having issues lately with this after changing both the master and slave cylinders. The problem (at leas for us noobs) is figuring out the correct way to do it: there are different suggestions declared to be "the correct way" in these forums and on you tube.

  6. #6
    Join Date
    May 2010
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    Honolulu, Hawaii
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    753
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    '73 E9, '94 E34, '02 E46
    Bleeding a clutch is no different than bleeding any other hydraulic system: find the bleed nipple, connect some hose to it, open/close it with an (8mm box wrench?) as your lovely assistant pumps the pedal. Clutch has the advantage of the bleeder 'way far under the car. Work carefully there. My lovely assistant is booked, you'll have to find your own. They come in different sizes and temperaments, shop around until you find one you can live with.
    Charlie

    Your mission, should you decide to accept it, is to add value to these threads, either by pictures or by descriptions, so the next person with the same or similar problem stands on your shoulders.

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