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Thread: Fuel tank question.

  1. #1
    Join Date
    Apr 2009
    Location
    Ecosse
    Posts
    3,782

    Fuel tank question.

    Is the filler neck detachable from the tank close to the tank?

    450 fuel tanks.jpg

  2. #2
    Join Date
    Nov 2007
    Location
    BANCHORY
    Posts
    3,399
    No. All one piece tank and filler neck.
    Drives a Smart Cdi - 65 to 85 MPG

  3. #3
    Join Date
    Apr 2009
    Location
    Ecosse
    Posts
    3,782
    Thanks TK.
    Sufficiently round that it could be cut and and a piece of hose clamped over it without it leaking (for installing in something other than a smart)?

    450 underside cw fuel tank #3.jpg

  4. #4
    Join Date
    Dec 2015
    Location
    Auckland, New Zealand
    Posts
    47
    Greetings, Anything is possible, Trumps the proof of that. BUT, (there's always a but) the reason plastic fuel tanks are made in one piece, plastic welded etc., is so static electricity does NOT build up at any point and jump across to another point (spark). If you go cutting and joining you introduce the possibility of a difference in 'conductivity' of electricity. With a difference, there's a great chance of a spark across the gap. Exactly the same thing happens inside the combustion chamber BUT this spark is controlled and is supposed to happen. If a spark were to occur inside a fuel tank and the air/fuel mixture is correct (as when the tank is large, has little fuel and that fuel is warm) you may get out of the car alive, maybe unburnt but your hearing will be shot. Remember the 'Big Bang' theory? They discovered what that little noise was, milliseconds before the big bang - a voice saying, oh ****e.
    There's another reason not to 'bodge' the design of fuel systems / tanks, they were designed to withstand accidents, with all due diligence to the design. To a point plastic will move and stretch, containing their contents. That's why, very few vehicles explode in an accident - EXCEPT, in the USA, they're different!!!
    If, on the other hand, you were thinking of putting the larger Smart fuel tank in place of the smaller one you don't have to cut anything. But I'd suggest asking FQ101 or Evilution for their input into the 'replumbing / wiring / etc., required. Best to disconnect and remove the battery from the car before doing anything to the fuel system. To get the tank in and out, you need to drop the rightside of the rear subframe, the left side as well but no where near as much.
    Try not to do it around the 5th Nov., if there's an explosion people may think you're having a go...
    Cheers, Ian.

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