thought I'd repost this as it was lost on the old forum crash......... if you can weld, brazing should be no problem. Couple of things you will need - brazing torch with small nozzle (or failing that you can use a plumbers type blow torch not as accurate for localised heat), couple of sticks of silver solder and some flux. The flux comes as a powder, mix a small amount with water until it is a milky paste. Clean the area to braze (such as unioins, holes, [glow=red,2,300]flange[/glow]s etc) then smear over the area with the flux paste. using your brazing torch heat the area evenly until the flux goes clear and just starts to bubble .....leave it too long and the flux burns off and the braze wont run well. Once at the right temperature (and its just a case of practising a few times until you can tell) take your silver solder/brazing rods and touch against the area you want to braze. If you've got it right then the silver solder should melt and flow around the union by capillary reaction with out direct heat from the brazing torch. If its too cold the solder either wont melt or wont flow nicely. If it melted but didnt flow then a go over with the brazing torch should melt it again and it should flow round - might need another dab of solder on it. The trick is getting the heat just right and not putting too much solder on there, otherwise it looks messy and can sag ....like mine :-[ . get it right and it looks dead neat wipe/clean off any excess flux as its corrosive and you're done I reccon its easier than welding (obviously no good for structural repairs to the body) but great for things like petrol tank repairs or delicate areas as its a bit more gentle than MIG If your mad enough to braze a petrol tank then empty it and leave it to vent (ideally for a couple of months like mine-afew days to a week will be fine) there may still be some residues and the possibility of vapours still in there so I then fill the tank with water to the brim to push out any fumes. I do this a couple of times. I then fill it up to just under the area I want to braze (to be on the safe side) - fill it too much and the water will cool the area too much for the silver solder to melt and flow I wire brushed off the petrol tank and cleaned it up, its in pretty good condition TBH. As there was some "water marking" I thought it best to fill it with water to check for leaks you can see a small mark from where some one in the past had put a screw through the inside panel and it just distorted the metal slightly - no leak here though This one was weeping though so an ideal candidate for brazing I didnt take pics as I went unfortunatly but the description of what I did is above.............and heres how it turned out I decided to braze up the pin holes in the tank.....and Im still here so no explosions. I decided to do both even though only one was weeping (this one) this one wasnt leaking, I put a bit much on there and it slumped a bit .....I'd not brazed in ages :-[ hope this was of som help to anyone trying a similar repair
