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Thread: fuel line quick disconnect

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  1. #1
    They call me Gort scootrp125x's Avatar
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    fuel line quick disconnect

    I replaced the male part of my fuel line quick disconnects in 2008. BMW only recommended replacing the male parts and now one of my disconnects is leaking. I cant tell if the female part or the o-ring is leaking. I would like to replace the entire assembly, both male and female. Does anyone know if auto part stores carry these kinds of parts in the all metal variety that I should have used in the first place? I dont know what BMW is selling these days and it will take a few days to order from Beemer Boneyard.

    Thanks for any help. I tried to search the forum knowing there were other posts about this but the new forum format appears to have lost all of the previous informative posts.

    Mark
    04 R1150RT

  2. #2
    Registered User roger 04 rt's Avatar
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    If you used the old hose, it's possible that your new one isn't clamped tightly enough. I noticed that mine required a lot of clamping force when I replaced them, before replacing the hose. Not aware of auto parts availability. I don't think there's an o-ring on the female side.

  3. #3
    They call me Gort scootrp125x's Avatar
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    The replacement fittings I bought from BMW 4 years ago have a metal male part and a plastic female part. The part that was leaking has a female part on the fuel line that comes directly from the tank. Now that I have disconnected everything and removed the tank there is no leak. I wonder if it could be the o-ring. I have an extra set of o-rings that must have come with the BMW replacement fittings. I will replace the o-rings, reinstall the tank and see if the fitting leaks again.

    The clamps seem tight but I will check them again to make sure they are tight.

    No luck at Napa, Advance and Pep Boys with replacement fittings.
    04 R1150RT

  4. #4
    Nickname: Droid
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    If there is a local "Parker Store" in your area (usually part of the local Parker hydraulics distributor), they can order and sell you a set of nickle plated 100% brass disconnects. Be sure to tell them it is for fuel, and that the system pressure of 100 psi is well within the capability of the disconnects. Also ask for the set that has the line shutoff feature for both the make and female end.

  5. #5
    Benchwrenching PGlaves's Avatar
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    You almost certainly have a leaking O ring. Each half of the disconnect has a shut-off so when disconnected fuel doesn't flow. When connected both shut-off mechanisms are pushed open. That leaves the O ring as the seal between the two parts. Since the leak seemed to be at the female side, and once disconnected it stopped, that screams O ring.

    The O ring is the small one around the tip of the male side.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://www.bigbend.net/users/glaves

  6. #6
    They call me Gort scootrp125x's Avatar
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    Quote Originally Posted by PGlaves View Post
    You almost certainly have a leaking O ring. Each half of the disconnect has a shut-off so when disconnected fuel doesn't flow. When connected both shut-off mechanisms are pushed open. That leaves the O ring as the seal between the two parts. Since the leak seemed to be at the female side, and once disconnected it stopped, that screams O ring.

    The O ring is the small one around the tip of the male side.
    Thanks Paul. I spoke to my BMW dealer parts guy and he says they change the o ring every time they disconnect the halves.

    That will be my project for tomorrow morning. I'll let you know how it comes out. Would you put any oil or vaseline on the o ring? I seem to remember that advice in the past about the QD o rings.

    Thanks
    04 R1150RT

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