Author Topic: Heeeeelp!! Leaking connections tank to carb  (Read 792 times)

Online Greybeard

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Re: Heeeeelp!! Leaking connections tank to carb
« Reply #15 on: 02.09. 2020 09:30 »
Just a reminder to anneal copper washers, to make them soft, just like a copper head gasket.
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Offline Swarfcut

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Re: Heeeeelp!! Leaking connections tank to carb
« Reply #16 on: 02.09. 2020 10:02 »
   Push on connections on banjo fittings rely on the fuel pipe to be a tight fit on the spigot.  Clips and crimps are not to form a seal, more to stop the pipe coming off.  Flanged connections need undamaged faces, and sealing washers that end up compressed, rather than threads bottoming out and not applying sufficient clamp force. This also applies to conical fittings, which can sometimes be lapped to remove scores and imperfections so they closely match...Brasso metal polish was what we used.

 Tank/tap joint is the awkward one, especially if the tank has a bas***d thread as somebody's idea of BSP Thread.

 Swarfy.

Offline bakerlonglegs

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Update
« Reply #17 on: 03.09. 2020 08:40 »
Thank you all again for the advice. So I got stuck in and SUCCESS!! I now have a leak free fuel supply, thanks to the advice on here. This is what I did:
Replaced the jubilee clips with petrol pipe clips (Halfords 12-14mm) and, confirm, the fuel pipes are already nice and tight on all the spigots before using the clips.
Replaced the fibre washers on the fuel pipes banjo to float chamber and float chamber to jet block connections.
Checked and re-tightened the jet block.
Used Permatex Form A Gasket Cement on the threads for the reducers to the tank and the fuel taps to the reducers, as these won’t be coming off again any time soon. Word of warning - this is properly sticky stuff, use gloves when you’re applying it as it’s a bugger to get off skin.
Used PTFE tape on the fuel line to tap connections, as they will need to come off more regularly to take the tank off for service access, plus the taps and the connections are all new.

 *beer*