Fuel leaking through the tank badge

[TaylorP]

Any experience with a fuel tank leak through the badge mounting screws? The tank isn't in too bad a condition but after filling up I've noticed the leak. I don't know if its coming from the end or the weld. I'm currently thinking whether to fit a modern good quality liner or try and seal it from inside the badge mounting screw. Thanks for any suggestions

[muskrat]

G'day Taylor.
I had similar many years ago with a 51 A7 tank. One of the holes was stripped and in my failed repair it started leaking. I had to line the tank with Por15. It's final resting position to dry was with that part down to give extra thickness over that spot.
Cheers

[Joolstacho]

If like me you hate 'liners', use silver solder or braze to fill the screw hole and re-tap the thread.

[Rex]

You'd do well to get an effective solder "fill" of a blind hole, and then you'd do well to accurately redrill the hole for retapping.
And then the tank would need repainting too..

[RoyC]

Fill the hole as explained ^^^ and fix the badge with 3m double sided tape. 

[Joolstacho]

No biggie, done it a few times, with silver solder. Pretty easy really.
Perhaps I've been lucky.

[KiwiGF]

Maybe fill the hole with jb weld epoxy filler and retap it I’ve not tried anything like that but its worth a go if you have some jbweld in the shed. Its quite liquid and would sink and fill gaps. Alternatively dont tap it and use a good double sided tape for 5he badges, and glue dummy screw heads on as well.

[TaylorP]

This is what I plan to do as a first attempt as the rest of the tank is reasonable. Current thought is to then shorten the screw and reuse.

[Flashgreubon]

+1 with you Muskrat on POR 15.
I treated many tanks with it and never had any problems, from friable flat tanks to TIG pinholed new ones.
Make sure you get the tank sealer version, they have a paint as well and it does not work.
Dont leave a pool anywhere inside because the pool bubbles up when drying