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Thread: Fuel leaking down the fuel tap to tank screws

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    Default Fuel leaking down the fuel tap to tank screws

    Nearing the end on a 78 GS1000 and noticed that fuel was leaking down the thread on the fuel tap to tank screws. I would have thought these would be captivated in tank but obviously not. Is PTFE tape ok for these or is there a better solution. So close to getting it on the road again but the little things slow me down.gs1000.jpg

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    cowboyup3371's Avatar
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    Pick up some new dowty washers (rubber on the inside)

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    Have a look here
    https://www.cmsnl.com/suzuki-gs1000-...st/FIG-35.html
    In addition to the oblong o-ring seal (4) there are supposed to be gaskets (6) under the heads of the screws.
    I imagine the passage of time has not done them any favours if they are even still there.
    80 GS850GT
    79 Z400B

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    Have a look here https://www.ebay.com/itm/Dowty-Washe...kAAOSwPjhb5IIO

    i think they are 5 mm but ​ check first, has Brendon says it could be the petcock gasket like this
    https://www.ebay.com/itm/Suzuki-petc...gAAOSwMXdf2Y98

    i use Dowty washers for the sump/ oil drain plug
    Last edited by fastbysuzuki; 02-12-2021 at 10:46 AM.
    The big guy up there rides a Suzuki (this I know)
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    Quote Originally Posted by fastbysuzuki View Post
    i think they are 5 mm but ​ check first, ...
    I would say they are 6mm, as they fit on 6mm bolt.

    If your local hardware store does not have much metric, get a 1/4" washer.

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    I asked for sealing washers one time and the hardware guy was non-plussed, thinking CEILING washers.
    1983 GS 1100 Guided Laser
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    Quote Originally Posted by 1948man View Post
    I asked for sealing washers one time and the hardware guy was non-plussed, thinking CEILING washers.
    Wonder what he'd a done if you asked for a mill bastard.
    Roger

    1983 GS 850G
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  8. #8
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    Thanks for all of these suggestions, I've gone for some viton o rings between fuel tap and the tank. Hopefully these will seal around the bolt and the tank when tightened.

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    Quote Originally Posted by Wheelies View Post
    Thanks for all of these suggestions, I've gone for some viton o rings between fuel tap and the tank. Hopefully these will seal around the bolt and the tank when tightened.
    Get some silicone grease on them and be careful tightening. They will try find any excuse to twist and tear. I would be happier making something up from gasket paper.
    A cereal box with grease sealed up a tap for me and I was not inclined to change it.
    80 GS850GT
    79 Z400B

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    Fiber washers at the local hardware store, there's an english size that's just a tad small that you can ream out a bit with some sandpaper to make it fit.
    1983 Naked Goldwing Interstate GL1100

    1982 GS450txz (former bike)

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