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Thread: Odd box

  1. 31st October 2025, 04:12 PM #1
    CCreer
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    Odd box

    Greetings,

    I have a box connected to my vent line on my 1998 Defender 300tdi. Does anyone know what this is and what it is for? It is an AU 110 that was brought over to the U.S. in 2024.

    Thank you,

    Clarence
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  2. 2nd November 2025, 10:59 AM #2
    130camper
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    Looks like the vent pipe from the fuel tank to the fuel filler neck has been cut and maybe a home made "venting box" has been inserted in the vent pipe.

    Only thing I can think of is the previous owner was trying to prevent blow back when refueling and approaching full tank.

    Andrew
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  3. 2nd November 2025, 01:09 PM #3
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    POD
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    Yes looks like a home-made modification to the fuel neck breather. Does it have a non-original fuel tank (long range tank)? Or a non-standard body configuration that causes the fuel filler to be a bit awkward? This contraption might have made it easier to fill without the bowser repeatedly shutting off.
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  4. 7th November 2025, 09:11 AM #4
    CCreer
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    Quote Originally Posted by POD View Post
    Yes looks like a home-made modification to the fuel neck breather. Does it have a non-original fuel tank (long range tank)? Or a non-standard body configuration that causes the fuel filler to be a bit awkward? This contraption might have made it easier to fill without the bowser repeatedly shutting off.
    I have the standard tank. I was just wondering why someone would build and and install this box and what advantage it would serve.
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