SOHC.co.uk Forums > CB500/550

pin hole in fuel tank

<< < (3/4) > >>

JezzaPeach:
I also used POR15, the tin lid was so stuck I had to rip it off with mole grips. Prep is vital, I got hives from the fumes (on my exposed neck and forearms, went after about 3-4 weeks) so I’d wear a mask, cover up, and have a fan blowing the fumes out of the garage door. That was about 6-7 years ago and the inside of the tank is looking very sound and clean. Didn’t have holes just the start of fine rust. I covered the tap hole with a shaped piece of wood with 2 holes for the bolts and a gasket made from a cycle inner tube.

neat street:
Well, after alot of tests and trials, I have solved the pin holes. The main issue was to get the solder to stick to the steel, I tried all sorts of solder, mixed led and tin, tin only, acid fluxed core solder, fluxed cored solder... Also a range of fluxes, including an acid to `clean the suface` before using flux (did not work, but if you do this make sure you clean off the acid with plenty of water before fluxing), and in all but one case  which arrived today, was getting balls of solder rolling all over my test piece of mild steel. what I used today was  Eastwoods tinning butter and hey presto, it worked with all the solders that I had. I ended up using the plumbers lead free solder as can be seen in the before and after pics. may not be the prettiest, but have not got any leaks after a presure test. The main trick was to place the tining butter on the fully clean and prepaired surface (Dremmel with small wire brush was my tool of choice to get into all the small areas), heat the surface (I used a gas blow torch) but not to let the surface get too hot, just enough for the solder to melt and flood, taking it away from the surface every so often as needed and re-aply heat as  required just to keep the `tin` molton. Made sure all was sealed and gave a good wipe over to clean (helps to see if any more needs adding before presure test), then a cleaned over with a small power file. Hope this may help a few others with this problem.

florence:
Well done, looks great.

Skoti:
Tidy job.
Well done and a useful explanation of your technique for others attempting similar work.

SumpMagnet:
Great info @neat street
I know lead was effectively used as a filler back in the dim and distant past, but it's not something I have ever tried. Sure, I have soldered wire and copper pipes etc. but I have never tried something like this. Thanks for sharing your tests and results.

Navigation

[0] Message Index

[#] Next page

[*] Previous page