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Thread: Fuel Vent Issue

  1. #1
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    Fuel Vent Issue

    I ‘follow’ a pair of travellers called the dirty drifters on stalkbook. The following is reproduced with permission, in the hope it helps others:

    Like many a misadventure, the first issue started with a loud fart. Despite accusations levelled at the driver, it turned out that this improper noise was emanating from the Land Rovers fuel cap. The relief valve within the cap was letting air into the tank every 2-3 seconds with a loud gurgling sound.

    Clearly our fuel system had a venting issue, and it turns out this was due to dust ingress within the air intake system for the fuel tank. This air enters via the charcoal cannister and had blocked it up completely. Unfortunately this intake does not have a proper filter, only a plastic mesh , and despite being placed up high near the fuel filler has still been exposed to huge amounts of bulldust on our trip.

    We managed to unblock the cannister with our trusty onboard compressor and all seems to be well again.

    37062865_2236096829766239_4204692855874125824_n.jpg37125746_2236096866432902_8438824907948687360_n.jpg37184201_2236096899766232_5682093118149623808_n.jpg36957667_2236096946432894_1909647325723099136_n.jpg

    LINK TO ORIGINAL POST
    2010 TDV6 3.0L Discovery 4 SE remapped to RRS output, Alaska White, GME XRS-330c, IIDTool BT, Dual Battery, Apple CarPlay, OEM Retrofitted: Cornering lights, Door card lights, Power + Heated Seats, Logic 7 audio

  2. #2
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    I haven't noticed any vulgar noises from our fuel cap, but have heard a hiss of air going in when removing the cap to refuel. Maybe I should check to see if there's a blocked air relief filter on mine.
    Cheers.
    AlanH.

  3. #3
    Tombie Guest
    Quote Originally Posted by ATH View Post
    I haven't noticed any vulgar noises from our fuel cap, but have heard a hiss of air going in when removing the cap to refuel. Maybe I should check to see if there's a blocked air relief filter on mine.
    Cheers.
    AlanH.
    The small hiss is normal.

  4. #4
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    Mine sometimes farts and gurgles when I close the rear driver's side door (closest to fuel cap). Thought this was normal, maybe not?

  5. #5
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    I quite often do that as well and is quite normal for me without closing any doors.
    AlanH.

  6. #6
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    Quote Originally Posted by TuffRR View Post
    Mine sometimes farts and gurgles when I close the rear driver's side door (closest to fuel cap). Thought this was normal, maybe not?
    Likewise.
    Is it an issue? @veebs, do you know? And can I check it myself? I don't know what the third photo is of.
    If at first you don't succeed, that's one data point. - xkcd
    ----------------------------------------------------------------------
    2011 Discovery 4 SDV6 HSE

  7. #7
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    The V8 has a paper filter in the breather which I blew out on a number of occasions. it was surprising how much dust it caught. I wondered why the V8 had a filter and the others didn't.
    Fuji white RRS L494 AB Gone
    2023 Ford Ranga

  8. #8
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    Quote Originally Posted by Redtail View Post
    Likewise.
    Is it an issue? @veebs, do you know? And can I check it myself? I don't know what the third photo is of.
    No idea - I merely repeated what I read elsewhere. I reckon it's worth a look at it though, even if only as an educational inspection.

    I was wondering if it wouldn't make sense to put a foam cover over this thing, but i'm also only going off what I see in these pics... Something that lets air in, but with a big surface area to stop/slow dust
    2010 TDV6 3.0L Discovery 4 SE remapped to RRS output, Alaska White, GME XRS-330c, IIDTool BT, Dual Battery, Apple CarPlay, OEM Retrofitted: Cornering lights, Door card lights, Power + Heated Seats, Logic 7 audio

  9. #9
    Tombie Guest

    Fuel Vent Issue

    Quote Originally Posted by veebs View Post
    No idea - I merely repeated what I read elsewhere. I reckon it's worth a look at it though, even if only as an educational inspection.

    I was wondering if it wouldn't make sense to put a foam cover over this thing, but i'm also only going off what I see in these pics... Something that lets air in, but with a big surface area to stop/slow dust
    Your logic is sound, however the foam will tend to hold the dust in, where as all things being equal the pipe will breathe a little then stop - allowing dirt to drop away. The foam will capture the dirt, not allow it to drop away and will then combine with moisture to become a solid brick of mud, blocking all flow.

  10. #10
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    Fair point Tombie. I haven't heard/read of this whole issue before (have you?), so it may just be an isolated case, rather than an inherent design weak point.
    2010 TDV6 3.0L Discovery 4 SE remapped to RRS output, Alaska White, GME XRS-330c, IIDTool BT, Dual Battery, Apple CarPlay, OEM Retrofitted: Cornering lights, Door card lights, Power + Heated Seats, Logic 7 audio

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