Expansion tank leak - pin hole

Terry Stapley · #1 (**permalink**) 04-09-2007, 10:02 AM

I have had a small leak after installing a 60's style expansion tank and I think I have found where it orginates. It does not leak when cool but when the engine warms up and makes pressure it creates a very small drip on the bottom of the exp. tank that will leak a couple of drops per drive directly on the top of the alternator. The leak is not located near any hoses so I think I have a pinhole in the exp. tank. Do I need to take the tank to an radiator shop to have it repaired or is there a product (JB Weld?) that one can use to alleviate this problem.
Thanks for any assistance!!

blykins · #2 (**permalink**) 04-09-2007, 10:45 AM

I'd take it off and take it to a radiator shop so they can pressure test it. That will let you know if it's for sure the tank or not....and if it is, they can braze it.

lamaluv · #3 (**permalink**) 04-09-2007, 12:22 PM

Terry the tank on my car leaked just like yours and I had a radiator shop fix and pressure test it a couple of years ago. At last years WSCB it started leaking on the cruise to the lake and overheated the car. I tried some stop leak and thought I had it fixed. I went to the track at Fernley for a open track on the Monday following the Bash and it really started leaking. I finally just bought a new tank as the old one had been repaired to many times. No leaking with the new tank.

Dick

double ugly · #4 (**permalink**) 04-09-2007, 12:35 PM

A special solder needs to be used for it to hold up well. There was a thread on this last year. I solved my problem permanently (after two attempts to correct the problem) by getting a stainless steel one from Southern Automotive. No more leaks or hassle.
http://www.southernautomotiveengines.com/

5. B. Original Style Ford Surge Tank - Polished Stainless Steel $ 495.00
John