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While reconditioning the factory air conditioning evaporator assembly on our 72 coupe:
· Hoses as part of the muffler assembly were partly perished, and as such I proceeded to chop into them before realising they were crimped…
· I need to remove the crimp to fit new hoses.
· The tube appears to be welded to the crimped section.
· New part sells for an eye-watering US$220, and as such I want to recondition what I have.
Any recommendations on the best way to do this?
The only method I could think of is to cut the tube at the crimp (at the orange line on the photo, effectively shortening the tube), and re-crimp a new hose.
Thanks for your help.
Mark
Last edited by Mark Sal; Oct 23, 2020 at 05:29 AM.
I probably should have looked into this more myself. This is the only way to do it; cut at the red line, braze on a new fitting, re-crimp a new hose... I feel dumb now!
Mark Sal
Have you considered welding/soldering aluminum screw-type "fittings" instead of crimping hoses onto that assembly? Unless you're a purist, you can then use regular sized pre-crimped-screw-on hoses that would be easy to find. Hope I am making sense??
Last edited by carriljc; Oct 24, 2020 at 12:37 AM.
First off the video should't have used the wording BRAZE . the term Braze is the use of brass welding rod. I believe that the aluminum tube will melt before the Brass rod. Second, DO NOT !!! use brake clean when you are going to weld anything. Brake clean gives off deadly fumes when heated , yes it will kill you or screw up your brain quickly.
First off the video should't have used the wording BRAZE . the term Braze is the use of brass welding rod. I believe that the aluminum tube will melt before the Brass rod. Second, DO NOT !!! use brake clean when you are going to weld anything. Brake clean gives off deadly fumes when heated , yes it will kill you or screw up your brain quickly.
You may be correct about the new part and cost, but I might do it just to be able to buy generic screw on hoses, in the length of my choice, so I could route them as far away from the heat sources as possible.
Mark Sal
Have you considered welding/soldering aluminum screw-type "fittings" instead of crimping hoses onto that assembly? Unless you're a purist, you can then use regular sized pre-crimped-screw-on hoses that would be easy to find. Hope I am making sense??
Late reply to this thread...
I'm not a purist, so happy to consider screw type connections if there's an advantage.
Please send through an example if you can Carriljc.
I didn't even catch the reference to using brake fluid to clean! Good comments. If preparing the surface for welding, I'll use an aluminium welding specific product - I'll need to read up on it as I don't have experience welding aluminium.
Replacing with new parts; no doubt this in isolation makes sense to replace with new parts. But, I'm in Australia so bringing in reproductions start to get expensive. In addition, we're reconditioning the rest of the car so just generally keen to recondition existing parts when possible. Otherwise the cost will add up.
Where possible we wouldn't be opposed to non-Corvette specific parts (e.g. generic automatics air con parts).
I can see the op's wanting to change the hose problem with something that will be more user friendly for future repair if needed. Just have to do it in a safe way. Everyone should Google the use of brake clean and welding for eye opening information. It could save you or a friends life.
I can see the op's wanting to change the hose problem with something that will be more user friendly for future repair if needed. Just have to do it in a safe way. Everyone should Google the use of brake clean and welding for eye opening information. It could save you or a friends life.
Air conditioning muffler reconditioning - HELP!
