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Brazing a/c lines together

booksix on Sat May 16, 2009 6:36 PM User is offline

Year: 1988
Make: Ford
Model: Thunderbird
Engine Size: 302
Refrigerant Type: 134a
Country of Origin: United States

I just recently put a 2003 Mustang interior in my 1988 Thunderbird which required a different evaporator with different fittings (the old evaporator had a thread type fitting to connect to the receiver dryer); the new evap core has a spring lock fitting. I have the proper fitting with about 4" of tubing connected. My plan is to cut the old threaded fitting off the receiver dryer and braze on the springlock.

My question is, how do I flare the tubing on the new fitting to slide over the tubing on the receiver dryer and what are the steps to brazing? What brazing rods do I use and who would carry them locally (home depot, lowes)? Thanks!!

Dougflas on Sun May 17, 2009 8:43 AM User is offline

You are probably looking for a swedging tool to expand the tubing. Best thing to do is remove the evap and tig weld it together. There are alum welding rods out there that allow you to use a small torch to join the tubing if tig welding is not your choice.

booksix on Sun May 17, 2009 12:40 PM User is offline

Thanks, I can pick the tools up at Grainger tomorrow. Now, removing the evap core is not an option at this time so what I plan on doing is cutting the fitting off the receiver dryer, swedging the tubing on the extra springlock fitting I picked up, sliding it over the rec. dryer line and brazing it on. As far as tig welding the fitting on, well, I do not have that option if I want to do this myself. Is there a downside to brazing and is it especially difficult? I suppose I could try to find someone to weld it for me but the tubing is so thin that it'll be hard to tell if any given welder has the experience to do this without ruining my receiver dryer line...

TRB on Sun May 17, 2009 12:55 PM User is offlineView users profile

This is what we use in the shop for rebuilding aluminum lines. Very easy to work with and it's stated you can even use MAP gas as you heat source. I prefer to use an O & A torch set.

Aluminum Braze Rod

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booksix on Sun May 17, 2009 3:35 PM User is offline

Ouch... Too bad I only need one stick!! LOL. I will be usng MAP. Any tips (prep, heating, etc)? I saw some a/c braze kits include flux; needed?? Thanks!!

TRB on Sun May 17, 2009 4:16 PM User is offlineView users profile

Brazing Rod link I posted have flux in the rods.

-------------------------

When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

booksix on Sun May 17, 2009 7:42 PM User is offline

Ok, thanks! I'm heading to Grainger tomorrow to pick up the tools. I'll see if they have rods that are comparible. Do you know any specs on them?

Edited: Sun May 17, 2009 at 7:43 PM by booksix

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