FE Expansion Tank Build

[undy]

I modified my tank for my KC 482. I was plagued with solder leaks afterwards. I disassembled the whole tank, cleaned all the soft solder off , fluxed and re-soldered it with 15% silver solder. 10+ years later not one leak.

[Cobra_ZA]

Originally Posted by undy

I modified my tank for my KC 482. I was plagued with solder leaks afterwards. I disassembled the whole tank, cleaned all the soft solder off , fluxed and re-soldered it with 15% silver solder. 10+ years later not one leak.

Undy, what specific tank did you modify and how difficult was it? I am contemplating modifying a T-Bird tank to have the outlet on the left. Is it difficult to desolder and can it be done with a normal propane torch?

[undy]

Originally Posted by Cobra_ZA

Undy, what specific tank did you modify and how difficult was it? I am contemplating modifying a T-Bird tank to have the outlet on the left. Is it difficult to de-solder and can it be done with a normal propane torch?

You have to de-solder every joint and clean every last bit of solder off/out of the joints. If you don't the silver solder won't bond. After that and the application of the required silver solder flux you'll need an oxy-acetylene torch as a propane torch doesn't produce adequate heat for silver soldering. After nearly 20 years after I did the tank I've had zero leaks. I was repairing leaks every couple weeks with the soft soldered joints.