Fuel resistant adhesive/sealant?

[FulmenParticipant @fulmen]

My ol’ Suzuki has developed a leak in the fuel cock. The hose nipples are fixed to the main body with a cylindrical fitting that has become loose over time.  There isn’t any signs of sealants or gaskets so I’m assuming it was originally just press fit, but obviously that’s no longer good enough. The material seems to be zinc based, new or even used replacements are unobtanium, so I have to work with what I’ve got.

I’m thinking epoxy but perhaps there are better products available for a reasonable cost?

[bernard towersParticipant @bernardtowers37738]

Any chance of using JB Weld?

[gerry maddenParticipant @gerrymadden53711]

Epoxy glues are destructively attacked by ethanol in the fuel so not advisable.

Gerry

[Gerard O’TooleParticipant @gerardotoole60348]

ANy chance of a photograph?

My old Honda came with the new, non OEM fuel tap which might have been from a later model.   I assume the  original had started to leak. Is there a possibility of just changing the fuel cock for one from a later bike.

[FulmenParticipant @fulmen]

There isn’t much room for anything except a bespoke part, and if there are other parts that will fit I have no idea how to find them.

[Robert Atkinson 2Participant @robertatkinson2]

Araldite rapid is reasonably resistant to petrol and ethanol. Assuming you are using it primarily as a sealant rather than as a structural adhesive it will work OK for your application.

However if you need to get sealant into a narrow joint that has come loose but cannot be dissassembled fully I’d suggest Loctite 270. This is thin enough to gat into a joint and if fuel and ethanol resistant.
https://docs.rs-online.com/b036/0900766b80076b82.pdf

Robert.

Edit I was typing when photo posted. Definetely a job for loctite . 270 or 641

[JasonBModerator @jasonb]

Plenty of people putting model fuel tanks together with JB Weld (original) including me so that would be my choice.

[FulmenParticipant @fulmen]

After seeing the data sheet for loctite it seems to be a very good fit (95% @ 5000h). As it is right now it’s more or less a tight slip fit, so there isn’t much space to fill. Not sure if epoxy will work well under those conditions.

 

[FulmenParticipant @fulmen]

I believe I have 641 in the shop, if not I can get 577 which is a sealant that looks even better:

https://datasheets.tdx.henkel.com/LOCTITE-577-en_GL.pdf

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