Tank mounting bodge/fix

[Duncan]

Pure luck Duncan,

Taking a different view again I would say technical ability

[ajscomboman]

Pure luck Duncan,

Taking a different view again I would say technical ability

Ah, but I know better than to accept that view point! A recent seizure on a single would indicate that it might not be the case! Did you get to the bottom of it?

[The Vandal]

Original mounts drilled out to 11mm, counter sunk and deburred on the back/top side as much as possible,



Paint stripped back from around the mounts and tnut in place ready for welding,





Excuse the mess on my bench!

I've rinsed the tank out with water but it still smells of petrol a fair bit, I'll probably just block up the petrol tap mounts and stick the petrol cap on before welding and hope that's emnough separation of vapour and arc!

I have to go visit my parent's in order to weld as I don't have power in my workshop.

[Duncan]

I understand that you should run a car exhaust through the tank for a while to make it safe for welding

[Groily]

That'll do it.
Alternatively (following advice from a friend who does a lot of this stuff) I have mostly-filled tanks with strong mix of washing up liquid and water. Sloshed it around a lot, left for a bit, sloshed a bit more and then taken fuel taps or dummy bungs out out and rinsed through for an hour with running water (a hosepipe). Gets rid of all vapour traces and fuel smells and has worked safely for me a few times.
After doing repairs, dry thoroughly (hair-drier?) to get rid of water droplets etc etc, and maybe finish with a goodly squirt of WD40 or similar to minimise any rust risk. Probably all way over the top, but empty tanks are more dangerous than full ones they say!

[Andy G]

Flush well and fill with co2 welding gas, or nitrogen mix.

[clive]

Oh and don't make the mistake of pressure testing the tank for leaks without bolting a plate across the two mounting points front and back. If you don't, even a relatively low pressure can spread the tank making the holes too wide for the ears on the frame.

[56G80S]

On this topic, this is a post I was engaged with some while ago. Other matters have delayed implementing my own plan.

viewtopic.php?p=232600&hilit=Tank#p232600

JohnnyB

[The Vandal]

God, I forgot how awful I am at welding!





Still, I'm sure it's all stuck on there pretty good and painted black it's less noticeable and it should all be hidden when fitted anyway.

[clive]

You say you are awful at welding. No hole burnt in tank, brackets secured and hidden from sight. Sounds a perfect job to me!