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Oil Can Mechanic
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Today I decided to clean up the hack job the previous owner did at the top of the vacuum tank. I noticed that the original tube that comes from the intake manifold and goes to the tank is made of a somewhat harder copper than what I can easily get at the local hardware store. Does anyone know what it is?
It's not how fast you can go, but how good you look at 20 MPH.
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Technical Advisor ChatMaster - 10,000
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Technical Advisor ChatMaster - 10,000
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There is no specific reason for any material than what is available at your local parts house, or hardware store.  
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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May be you could ask Wallace F. Deck, proprietor of Teresa Crafts Restorations. He specializes in 27-29 stuff, but he can help with some other years too. 217-247-2162 or wdeck40000@juno.com
They are selling and repairing such stuff.
:vcca:
Solan G, # 32797
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The copper tube you by from a hardware outlet is in the annealed condition, and is delibratley soft, to enable it to be bent to fit where ever it need to go.
When you bend it, it work hardens the copper, and becomes harder where it is bent, but remains annealed (soft) where it has not been bent.
This is a natural characteristic of the copper.
JACK
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Oil Can Mechanic
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Oil Can Mechanic
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I know the hardware stuff is annealed and that is why it is soft, but the stuff on the car is exceptionally hard through the whole length. What I am seeing is not work hardening.
It's not how fast you can go, but how good you look at 20 MPH.
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Actually due to vibration over and extended period any copper tubing used in an automotive application will "work harden".
How Sweet the roar of a Chevy four!
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Joined: Feb 2009
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Oil Can Mechanic
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Oil Can Mechanic
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Ah, that would make more sense! I guess 81 years would definitely do a number on the copper.
It's not how fast you can go, but how good you look at 20 MPH.
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ChatMaster - 2,000
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ChatMaster - 2,000
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Hehehehehehe!   I also think we car dudes are turning more stiff after 81 years, stumbling around? Don't you agree???????? 
Solan G, # 32797
Take advantage in your hobby by being member of VCCA!
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Joined: Feb 2009
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Oil Can Mechanic
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Oil Can Mechanic
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Totally agree. Some days I too feel work hardened like the copper.
It's not how fast you can go, but how good you look at 20 MPH.
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Shade Tree Mechanic
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Shade Tree Mechanic
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Speaking of copper tubing, does anyone know where I could get 7/16" copper tubing and compression fittings? Every source I have checked goes from 3/8" to 1/2" tubing. I would appreciate any help.
Gary
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Oil Can Mechanic
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I have never seen that size, nor is it listed on any web site I can find. What is the application? perhaps that will help us help you.
It's not how fast you can go, but how good you look at 20 MPH.
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Be careful of old copper tube as a mate of mine who owns a 27 Chev and was 300 miles from home on tour broke the copper pipe that goes from the relief valve under the carby, through the block to the oil filter. As the break was where the pipe goes between no.2 and no.3 cylinder he still had oil pressure, however the oil was pumping through the broken copper pipe onto the road and he ran a bearing. The end of the break in the copper showed that it had crystallized.
I've been told that you can re anneal the hard pipe with a gas torch or putting it in the oven for while. Best to replace with new pipe.
Chris
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Oil Can Mechanic
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Back in my young and foolish days I used copper on a more modern car, before I knew better and it fatigued and cracked. I watch all the stuff on the 28 like a hawk. Call me paranoid. If my next door neighbour had his way, he would change it all to stainless.
It's not how fast you can go, but how good you look at 20 MPH.
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