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Old 09-04-2014, 08:09 PM   #1
pwdcougar
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Brake lines

In the catalogs and on most pictures the steel brake line along the frame to the rear is two pieces. Is there a reason for this? I got a coil of that new copper stuff and was planning on doing in one shot.

Is there a reason why I shouldn't?

Paul
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Old 09-04-2014, 09:07 PM   #2
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Re: Brake lines

Copper is too soft for automotive brake lines. I believe it has to be seamless steel tubing with double flaired ends.
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Old 09-04-2014, 09:14 PM   #3
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Re: Brake lines

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Copper is too soft for automotive brake lines. I believe it has to be seamless steel tubing with double flaired ends.
Copper is indeed too soft. Steel uses double 37 degree flares Stainless steel uses 45 degree single flares. A single run is preferable. Fewer connections that might spring a leak that way but that is not possible given the difficulty of bending the line.
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Old 09-04-2014, 09:22 PM   #4
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Re: Brake lines

They make a new copper based brake line that made specifically for automotive applications. It won't rust and is a zillion times easier to work with than stainless. Surprised that more people haven't heard of it.

Back to my question. Do I need to do the line as two pieces?

Paul
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Old 09-04-2014, 09:27 PM   #5
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Re: Brake lines

Fitz it was my thinking as well that fewer connections would be better.

Paul
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Old 09-04-2014, 11:22 PM   #6
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Re: Brake lines

Quote:
Originally Posted by pwdcougar View Post
They make a new copper based brake line that made specifically for automotive applications. It won't rust and is a zillion times easier to work with than stainless. Surprised that more people haven't heard of it.

Back to my question. Do I need to do the line as two pieces?

Paul
I'm no expert, but I can't think of an operational reason why you couldn't make it a single run.

The two piece could have been for ease of installation perhaps??
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Old 09-04-2014, 09:42 PM   #7
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Re: Brake lines

I have used the new stuff, actually just used it on the 67. It is easier to work with in tight spaces than the old stuff, but it turns quickly- the copper alloy or what ever it is based on shows quickly. As an aside, the larger diameter is actually harder to bend accurately than the standard stuff. Also it is twice the cost.
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Old 09-04-2014, 10:11 PM   #8
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Re: Brake lines

Interesting. So far I haven't had a problem with it. What do you mean by "turns"?

Paul
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Last edited by pwdcougar; 09-04-2014 at 10:13 PM. Reason: Wanted to change wording. Should have quoted the previous post.
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Old 09-05-2014, 01:02 AM   #9
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Re: Brake lines

make it in one run.......I did it and haven't had any problems.
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Old 09-05-2014, 01:12 AM   #10
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Re: Brake lines

Are you talking about the nickel-copper (Monel) stuff?
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Old 09-05-2014, 06:20 AM   #11
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Re: Brake lines

I just ran mine in SS and did it in one piece, did the same on my previous truck also. As already mentioned it was probably in 2 pieces for ease of installation.

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Old 09-05-2014, 08:30 AM   #12
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Re: Brake lines

It is advertised as nickel copper, but it's actually 90/10 seamless copper nickel. Looks interesting.
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Old 09-05-2014, 12:06 PM   #13
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Re: Brake lines

Wasn't sure if it was nickel/copper or copper/nickel. Thought my parts guy said it was mostly copper.

Thanks for the advise guys and I'll try to do the run as one shot. Kinda annoyed at myself though. Thought that I researched the sizes I needed and bought a roll of 1/4" and all the fittings only to find that the lines on the axle are 3/16" on my K10 burb. I'm not that worried about the price and would have done stainless if it were easier to use. I tend to keep my vehicles a long time and there have been too many times were I've blown a steel line. Thank god for emergency brakes.

In another post I asked about what people call it. Is it an emergency brake or a parking brake? With an auto trans I've always felt that the trans and parking pawl inside is good enough. With a manual trans I always park it in gear. Except for rare exceptions it is not used for parking. Too many times though there has been an emergency and again, thank god there was an emergency brake there just waiting for me!

Paul
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Old 09-05-2014, 02:37 PM   #14
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Re: Brake lines

By turn i mean that the line initially looks more nickel, but as it oxidizes it shows the copper. The color changes and they look weird.
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Old 09-06-2014, 07:11 PM   #15
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Re: Brake lines

Wow this stuff is a dream to work with. Easy to bend and to flare!

Paul
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1969 Mercury Cougar Standard 4 speed
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Old 09-20-2014, 12:07 AM   #16
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Re: Brake lines

you have 706 alloy copper nickel brake line which is 90/10
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Old 09-20-2014, 02:33 AM   #17
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Re: Brake lines

Pretty sure slikside hit the nail on the head. I had to do yoga just to get one of the two piece lines in under my truck. Pretty sure they are sold as two piece for that reason - and that is also likely the same reason the factory made it two piece. It is perfectly fine to run it as one line if doing custom - but if you happen to have your cab off the frame, think of it from the perspective of "what if I have to replace a line after I have the truck all assembled?" If install/remove is not an issue for you personally - there is no reason to not make it one line. I went with two just because the factory did.
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