Bede Less chance than a snowball has of not melting in hell. If part of the boiler is in cold water, you'll probably find that you can't get the rest up to temperature. Your other problem would probably be that, if you did manage to get the thing up to Hard-solder temp, scale would flake off inside and who knows what other problems would be caused. I suppose if it's already ruined, you can only try. If it's mechanically sound, why not just use Consol ? FYU. Couple of lads tried to "save" one of our club loco's boiler which had sprung a leak around the fire-hole. No comsol in it. They used oxy-acet to get local heat. Kept chasing more and more leaks and then found that they'd baked the internal crud so that it blocked the blow-down and clack bushes which are low down on the backhead. We're making a new boiler. Andy -----Original Message----- From: modeleng-bounce@xxxxxxxxxxxxx [mailto:modeleng-bounce@xxxxxxxxxxxxx] On Behalf Of Bede McCormack Sent: 11 June 2006 06:40 To: modeleng@xxxxxxxxxxxxx Subject: [modeleng] Solder Qestion - - - - - My question is, what are my chances of successfully hard soldering the leak and not melting off the Comsol? How about if I stood the thing on end with the backhead in a half inch of water or so? - - - Thanks, Bede MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line. MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.