Welded Heat Exchanger

Coles_55

New member
Joined
Dec 5, 2005
Messages
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Age
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Location
Eagle, WI
Is it possible to have one of my heat exchangers welded? Theres a guy down the road from me thats a cert. welder, any way they can be welded? I have 2 small pin holes in the one under the footwell.
 

I was hoping that I could just have him weld them on the sled, and just run the sled and see if they leak. Cause if they leak them I would have to take them off and just throw a different one on there.
 
it would be better and easier to take them off to get welded hand to get my rear exchanger welded but make sure you get all the antifreeze out.
 
I have repaired many heat exchangers, I use a product call "aluma-braze" Basically it is just like brazing steel but with aluminum. Very easy and no electrical malfunctions to electronics. Just be sure to remove all coolant from effected area, it is acutally best to hav the cooler drained so you can get the best heat transfer. Al
 
alswagg said:
I have repaired many heat exchangers, I use a product call "aluma-braze" Basically it is just like brazing steel but with aluminum. Very easy and no electrical malfunctions to electronics. Just be sure to remove all coolant from effected area, it is acutally best to hav the cooler drained so you can get the best heat transfer. Al
Is this product the same as that alumaloy product that was offered in infomercials on TV for awhile?
 
I have one of those "expensive" welding machines and have not tried my hand a brazing aluminum. We hav esome welding rod at work that we can weld zinc or aluminum with, not sure of the name.
 
Very important to get all the coolant out. I brazed my front heat exchanger last year, and until I got all the coolant out it wounld'nt heat up enough for the brazing rod to flow. it will be the same way with a TIG. Any contaminant and it won't take. Change_up is right do as much of the prep work yourself, if you have someone TIG it.

I found a brazing rod at Home Depot from Benzomatic. It just said Aluminum Brazing & Welding Rod on the package. The rod has a lower melting point than the Alumabraze that has been mentioned. Get a stainless steel wire brush and clean the surface area around the leak with the brush until it is nice and shiny. You can use a hand held propane torch with a turbo tip and Mapp gas. You can do it yourself for really cheap. Mine still looks like it did that day I did it... And the most important thing... it does not leak!
 
Yeah I drained majority of the coolant and took it to one of my vendors and had him weld both sides for reinforcement and he did a pressure test as well. All good now!
 


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