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Thread: Fuel hose replacement

  1. #1
    Join Date
    Feb 2018
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    Bay Area
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    My Cars
    1993 Calypso e31 850ci

    Fuel hose replacement

    My e34 was recently really struggling with cold starts (2-3 cranks) when she typically fires up immediately. I kept getting faint smells of gasoline from the rear of my car and so I went and did some exploring. Turns out my fuel hose (#16121180409) running from the fuel filter in the rear (#13321268231) to the fuel pump is leaking pretty badly. Leaking enough to cause a small 6-8 inch puddle of gas (15-30 mins of observation) in the driveway.

    IMG_6434.JPG IMG_6433.JPG

    This startled me, so the car is out of commission while I await parts. Those familiar with this problem, I have questions:

    1. How dangerous is it to drive with this gasoline leak? I am assuming this is a 10/10 in terms of danger - reaching levels of "turning into a rolling ball of flames down the highway" dangerous, but I can be wrong...
    2. It appears the hose running from the fuel filter and fuel strainer (#16121178632) attaches to the sending unit. According to this amazing DIY video:



    The fuel pump assembly/sending unit is located in the trunk, and it appears the hose removal process is straight forward. I just need to get the clamps off and then pull up the hose. Am I missing something else here?
    3. I have gasoline in the tank still. Will the fuel filter leak gasoline as I remove the hose? If so, what's the best way to plug the fuel filter? Will the fuel pump in the trunk also leak gasoline?
    4. Is there anything else I should be aware of while I'm down there?

    Thanks!

  2. #2
    moroza's Avatar
    moroza is offline MORΩN ΛABIA BMW CCA Member
    Join Date
    Sep 2006
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    BFE
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    11,090
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    E34T
    1. Leaking explosive liquids is never a good idea.
    2. Nope, it's as straightforward as you imagine.
    3. Yes, it'll leak some. Just don't wear your nicest shirt when doing this.
    4. Might as well check out the condition of the other hoses, CV boots, brakes...

    Oh, be prepared to have to undo crimp-style hoseclamps. I do them with pliers. Have normal replacements on hand before disconnecting any lines.

  3. #3
    Join Date
    Feb 2018
    Location
    Bay Area
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    My Cars
    1993 Calypso e31 850ci
    Thanks Moroza. Got that taken care of this weekend. Turns out, removing the hose from the fuel pump in the trunk is unnecessary. Hose just connects to fuel pump tube that runs up to the trunk and front of car (I am assuming).

    Another handy tip: use a small knife or razor to slice the hose slightly, then slide off with pliers. Just watch out for the gas that will be coming out. Not a significant amount, but enough to ruin your clothes.

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