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Aluminum Brazeing rods

Underdog on Mon August 04, 2008 3:29 PM User is offline

Year: 1986
Make: Chevy

Has anyone had luck useing these? I have a spot on the low side tube coming out of the accumulator where a cable rubbed a thin spot and it blew a pinhole when I started charging. I have a kit with a few rods I bought years ago to fix an aluminum hood. It has a marker crayon you're suposed to use to make sure the temp is right without melting the aluminum. I thought about a compression union but it's right on a curve in the tube. Any chance this will work or am I wasteing my time?

HECAT on Mon August 04, 2008 3:54 PM User is offline

I would just replace the accumulator.

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Underdog on Mon August 04, 2008 6:11 PM User is offline

Sorry, My post wasn't worded correctly. The tube I am trying to fix is on the compressor hose assm. Pretty hard to find one for an 86 and I am trying to avoid getting into having it rebuilt with a compression fitting, longer section of hose ect. I did get a new accumulator when I started this adventure.

Anyhow, I tried it and it appears to have worked. Sort of reminds me of soldering or way back in the day, leading body panels. Tin first to assure the bond and then fill. Did it on the car & couldn't get the tube upside down so had to do it vertically. Pluged the other end and put 100psi of air to it with soapy water and it didn't blow bubbles. Being on the low side, I think it should hold...hopefully.

As a sidenote, this was caused by an aftermarket cruise control my dad had installed when we first got the car. They ran the cable from the carb to the cruise unit which is bolted to the fenderwell, under the air line. Took 60,000 miles of engine rocking to wear through but it did. A little more though by the installer and it never would have happened. Ironic thing is that after all these years, the cruise still works perfect!

chris142 on Mon August 04, 2008 9:10 PM User is offline

We use the stuff every day. We used to get the rod and a pink powder (flux?) to make it stick and it works great. Were having a hard time finding the pink powder now........The rods that are supposed to work w/o flux are junk.

TRB on Mon August 04, 2008 10:07 PM User is offlineView users profile

Chris get some of the rods we are selling. Stuff works real well! I can send you a stick if you provide an address.

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Underdog on Tue August 05, 2008 8:55 AM User is offline

The ones I used were in a kit from NAPA. Like I said, bought it a long time ago, probably as old as the car. No flux used but has to be perfectly cleaned. Kit came with a stainless steel toothbrush that is recomended since sandpaper leaves residue. The key was to not heat the rod but heat the tube until the rod melts when rubbed on it. Like I said, same principle as soldering. I'm sure the ones you guys sell work just as well.
I know this may sound like a shoemaker repair but it is an 86. I'm already over budget on a car that's probably only worth a thousand bucks. My better judgement said don't even mess with a system this old. Finding this site and learning a lot about air conditioning systems sort of spurned me on. Thank you....I think???? LOL

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