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Thread: long range fuel tank and fuel gauge.

  1. #1
    Join Date
    Jan 1970
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    darwin
    Posts
    1,411

    long range fuel tank and fuel gauge.

    am i correct in thinking that if my discovery has a long range tank fitted it should make no differance to the fuel gauge from standard,The pump therefore the guage would be at the same depth of fuel as standard the tanks are just wider.the old owner told me that the gauge hadn't been calabrated for the new tank,dosn't seem correct or am i missing something.
    Darwin
    93 tdi disco [gone to a better home]
    2003 d2a v8 [land rover engine not ford]
    1988 k100rs bmw
    85 county izuzu [gone to a better home]
    69 series 2a [gone to a better home]
    and the tinny

  2. #2
    Join Date
    Sep 2012
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    Adelaide Hills
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    11,522
    Quote Originally Posted by lewy View Post
    guage would be at the same depth of fuel as standard the tanks are just wider.

    more or less how it works.
    Quote Originally Posted by DazzaTD5 View Post
    Its a land Rover Defender... you need a real mechanic

  3. #3
    Join Date
    Jan 1970
    Location
    Logan
    Posts
    22,178
    While you would think so, it ain't necessarily so.
    Our Defender has a 120 litre long range tank fitted. The fuel gauge does not move until we have done between 400-450kms, depending on driving style and if we are towing.
    I assume the sender was not relocated when the previous owner had the tank fitted.
    2009 Defender 110 2.4. ARB bulbar, Ironman winch, Safari snorkel, Steinbauer chip, AP HD clutch, Lightforce spots, larger tank, Off Road Systems drawer, Traxide 160 controller, Tekonsha brakes, Mulgo seat runners, Uniden UHF, Nuggetstuff seat corners, breathers, Polaris GPS.

  4. #4
    Join Date
    Jul 2013
    Location
    Alice Springs, NT
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    252
    Quote Originally Posted by DiscoMick View Post
    While you would think so, it ain't necessarily so.
    Our Defender has a 120 litre long range tank fitted. The fuel gauge does not move until we have done between 400-450kms, depending on driving style and if we are towing.
    I assume the sender was not relocated when the previous owner had the tank fitted.
    My defender has 100l fuel tank and does the same thing
    97 300tdi Defender 130

  5. #5
    Join Date
    Mar 2008
    Location
    Kilmore, VIC
    Posts
    832
    Yup. My D1 does the same with LRA tank fitted. Doesn't move the gauge needle at all for about the first quarter tank burned and then creeps down slowly after that. Low fuel warning and empty on the gauge are about right though, and they are the important ones
    DiscoClax
    '94 D1 3dr Aegean Blue - 300ci stroker RV8, 4HP24 & Compushift, usual bar-work, various APT gear, 235/85 M/Ts, 3deg arms, Detroit lockers, $$$$, etc.
    '08 RRS TDV8 Rimini Red - Compomotives, 285/60 BFGs, Rock sliders, APT full under-protection, Mitch Hitch, Tradesman alloy rack, LLAMS, VCIQ

  6. #6
    Join Date
    Sep 2012
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    Adelaide Hills
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    11,522
    oh interesting,
    my d2 its completely even. and each notch on the gauge is about 100km
    Quote Originally Posted by DazzaTD5 View Post
    Its a land Rover Defender... you need a real mechanic

  7. #7
    Join Date
    Jan 1970
    Location
    darwin
    Posts
    1,411
    [QUOTE
    I assume the sender was not relocated when the previous owner had the tank fitted.[/QUOTE]
    cant see how it could be as the sender is part of the pump assembly. if the float is at its lowest then the gauge should read empty etc etc.Guess i will have to pull the pump and check were the float is in relation to the bottom of the tank.
    Darwin
    93 tdi disco [gone to a better home]
    2003 d2a v8 [land rover engine not ford]
    1988 k100rs bmw
    85 county izuzu [gone to a better home]
    69 series 2a [gone to a better home]
    and the tinny

  8. #8
    Join Date
    Dec 2007
    Location
    Brisbane West
    Posts
    20,547
    The full reading obviously depends on "how full", is full. My standard 95litre tank can accept over that when there is still 10litres in the tank. Most people, me included, utilise the ullage consideration for storage, fine if the fuel is going to be used immediately.
    At least my Disco's fuel gauge doesn't race the tacho across the dash, unlike some V8s I've owned.
    If you don't like trucks, stop buying stuff.
    http://www.aulro.com/afvb/signaturepics/sigpic20865_1.gif

  9. #9
    Join Date
    Jan 1970
    Location
    Logan
    Posts
    22,178
    Quote Originally Posted by lewy View Post
    [QUOTE
    I assume the sender was not relocated when the previous owner had the tank fitted.
    cant see how it could be as the sender is part of the pump assembly. if the float is at its lowest then the gauge should read empty etc etc.Guess i will have to pull the pump and check were the float is in relation to the bottom of the tank.[/QUOTE]

    My Defender doesn't have a fuel pump in the tank.
    2009 Defender 110 2.4. ARB bulbar, Ironman winch, Safari snorkel, Steinbauer chip, AP HD clutch, Lightforce spots, larger tank, Off Road Systems drawer, Traxide 160 controller, Tekonsha brakes, Mulgo seat runners, Uniden UHF, Nuggetstuff seat corners, breathers, Polaris GPS.

  10. #10
    Join Date
    Jan 1970
    Location
    Central West NSW
    Posts
    11,908
    When the long range tank goes in, the sender on the pump has an extension welded into it which makes the gauge read correctly. When the pump gets replaced, the float arm has to be swapped over to the new pump to retain the proper calibration of the fuel gauge otherwise it will read wrong.
    Cheers
    Slunnie


    ~ Discovery II "Storm" ~ ~ Series IIa 6cyl ute ~ ~ Series II V8 ute ~

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