Pinhole leak in expansion tank

FFRBob · #1 (**permalink**) 06-10-2007, 05:35 PM

I guess I'm another victim of a pinhole leak in the brass expansion tank. Is there an easy fix for it? The leak is in the metal itself, not on the seam. I can't justify spending $425 on a stainless one right now.

ENTDOC · #2 (**permalink**) 06-10-2007, 06:41 PM

I have one for sale for 300 in the parts for sale section. Like new and beautiful, best of all it will never leak.

FFRBob · #3 (**permalink**) 06-11-2007, 01:10 PM

A little JB Weld on the inside where the leak was and that was all she needed.

lineslinger · #4 (**permalink**) 06-11-2007, 01:20 PM

Why not solder it?

FFRBob · #5 (**permalink**) 06-11-2007, 03:27 PM

It is directly behind the overflow tube and hard to get to.

Traveller · #6 (**permalink**) 07-05-2007, 09:41 AM

If your tank is 30 years old you're fighting a losing battle.

I had an old one that would develop those pin hole leaks and after the 3rd trip to the raidiator shop for repair I broke down and got a new one from Finish Line.

convincor · #7 (**permalink**) 07-05-2007, 06:47 PM

why mess with a 30 year old tank??
Buy a new one- http://cgi.ebay.com/ebaymotors/1958-...mZ170127086503

Dwight · #8 (**permalink**) 07-05-2007, 08:11 PM

A radiator shop should be able to solder it, if you can not do it yourself.

Dwight

SantaFe66 · #9 (**permalink**) 07-05-2007, 10:25 PM

I had a serviceable expansion tank stripped, had the inlet turned around to the driver side (including soldering it all back up, and pressure tested, and it's been fine since. I had the brass tank polished ($60) and it looks great.

Mine ended up with several pinholes that the radiator guy soldered up (they weren't on a seam either) and it passed the pressure test. This isn't rocket science. The old ones have a certain character that adds to the vintage look of these motors (my opinion). If you're a neat freak you might not like that, but it worked for me.

Paul



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