Whilst run of the mill "plumbing" copper will
indeed eventually work harden and crack ( I
experienced this 40 years ago on the TB), no
one would use normal copper tubing these
days surely?
The stuff to use is a copper - nickle alloy.
One of the most commonly seen CuNi brake
tube products goes by the name Kunifer.
Lots of it on Ebay.
Clive
Oxford UK
======================================
----- Original Message -----
From: <mgbob@juno.com>
To: <mgcharlie@comcast.net>
Cc: <mg-t@autox.team.net>
Sent: Thursday, June 10, 2010 1:36 PM
Subject: Re: [Mg-t] Gas line replacement
> It's true that vibration will work-harden copper lines. That was
> certainly a
> problem with the T cars that had separate oil filter connected to the pump
> and
> engine with copper lines. One needed to anneal the copper from time to
> time
> in order to avoid it cracking.
> But for fuel lines, work hardening is not much of a problem. Tank to
> chassis
> to pump(s) in the engine space, the line is secured to something solid and
> is
> not exposed to much vibration.
> Were my fuel lines to need replacement, I would use copper tube.
> Brake lines are, of course, a different matter. Cupro nickel is one
> material that some prefer to steel. A friend, a mechanical engineer, used
> it
> in his Austin Healey 3000 resto, only to have the Connecticut inspectors
> fail
> the car because the line looked like copper. He was able to get material
> specs
> from the tube manufacturer and the state relented.
> Bob
>
>
> ---------- Original Message ----------
> From: Charlie Baldwin <mgcharlie@comcast.net>
> To: Undisclosed-recipients:;
> Cc: mg-t@autox.team.net
> Subject: Re: [Mg-t] Gas line replacement
> Date: Wed, 09 Jun 2010 16:10:01 -0400
>
> Generally what I've heard is that you should always use steel for fuel
> and brake lines because the vibrations involved with a car will work
> harden copper making it brittle and prone to breaking.............
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