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#1 |
Registered User
Join Date: Jun 2013
Location: West Virginia
Posts: 6,421
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What size are brake lines?
Hey guys,
I've been off here for a while, since my mom is back to her house and requires full-time care. Dad can't afford to hire anyone to stay so guess who is on call 27/7? Nights aren't too bad since she's in pretty good shape from midnight till about 8 AM. Anyway.....what size are brake lines on a 1972 Chevy 2wd? I'm going with copper nickel this time. Thanks! |
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#2 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: What size are brake lines?
3/16 and 1/4
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#3 |
Petroleum User
Join Date: Dec 2010
Location: San Diego, California
Posts: 928
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Re: What size are brake lines?
1/4. I did it too, man. Took care of dad for months on nurse duty after heart attacks while trying to keep him interested in trucks for motivational purposes and exercise. He hung on for a while and after he passed away, mom went too seven weeks later. They had divorced in 1971 but were good friends til the end. This was 2009, nine years ago. It was a rough time for me
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![]() 1971 GMC Sierra Grande 2WD 1/2 ton, 350/400 auto 2008 Chevy Silverado 2WD 1/2 ton LT1 5.3L auto |
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#4 |
Senior Member
![]() Join Date: Feb 2012
Location: chillicothe, illinois
Posts: 690
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Re: What size are brake lines?
Just keep in mind that the copper nickel lines turn green. 3/16 for the front and 1/4 to the rear brake hose and 3/16 from rear hose to wheel cylinders
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#5 | |
Registered User
Join Date: Jun 2013
Location: West Virginia
Posts: 6,421
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Re: What size are brake lines?
Quote:
Oh well, the Statue of Liberty hasn't rusted any, she kinda looks good in green, and the bends and flares should be easier. ![]() |
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#6 |
Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: What size are brake lines?
How long does it take them to turn green? I have never had NiCopp lines do that.
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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#7 |
Senior Member
![]() Join Date: Feb 2012
Location: chillicothe, illinois
Posts: 690
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Re: What size are brake lines?
Make sure when you cut the copper line use a chamfer the end of the line before the flare. It takes a year or so to turn green
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#8 | |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,515
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Re: What size are brake lines?
Quote:
My NiCopp brake lines and fuel line haven't turned Green either, and they have been installed in the Panel Truck since 2015. LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#9 |
Post Whore
![]() Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,158
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Re: What size are brake lines?
I've never had it turn green. I'm just was looking at a car I did back in 2010 and the is was no sign of it turning green.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. ![]() RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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#10 |
Registered User
Join Date: Jun 2018
Location: Winston Salem, NC
Posts: 95
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Re: What size are brake lines?
Right or wrong I ran 3/16" lines in place of 1/4" on my truck. I used the nickel/copper lines and it was the easiest brake line I've ever worked with. Flared with little effort and bent easily with no tools.
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Stupidity was meant to be painful! |
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#11 |
Senior Member
![]() Join Date: Oct 2009
Location: Godley, TX
Posts: 17,964
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Re: What size are brake lines?
It would be wrong, not right, to run 3/16 if you ran it to the rear drums. They should be 1/4. Will it still work, yep - does it work with the proper pressure the way uncle GM designed it, nope.
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#12 |
Senior Member
![]() Join Date: Feb 2012
Location: chillicothe, illinois
Posts: 690
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Re: What size are brake lines?
Well my shop has been using them for about 10 years and have alot of repete customers. So i see the lines all the time. Do keep in mind the i live in the midwest so winters are bad and they are on daily drivers
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#13 |
Registered User
Join Date: Mar 2017
Location: Grants Pass, Oregon
Posts: 43
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Hi everyone,
Funny you guys are talking about brake lines at the time I am trying to get set to do my 69 long bed and I am over thinking it for sure, what to use, Stainless, NiCopp... so I have a few questions. 1. I have the disc brakes off a 72 for the front and Wilwood disc for the rear. Should I still run 1/4" for the rear or should I run 3/16" everywhere? 2. T304 grade stainless steel double anealed, or NiCopp for the lines 3. Where is a good place to get genuine NICopp line if that is the better choice, I have seen some on ebay that looks like copper tubing for refrigerant and I do not want it to be that soft and maybe the stuff that turns green that 70CHEVYBB described. Anyway, any sugestions you guys have will be appreciated. |
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#14 |
Registered User
Join Date: Jun 2018
Location: Winston Salem, NC
Posts: 95
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Re: What size are brake lines?
I bought these lines and was happy with them. Came with the different size fittings. Only other thing I needed was unions (couple bucks), a tubing cutter ($7 at Ace Hardware) and a double flare tool (about $20 at Harbor Freight). Stuff is very easy to work with.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
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Stupidity was meant to be painful! |
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#15 | |
Senior Member
![]() Join Date: Oct 2009
Location: Godley, TX
Posts: 17,964
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Re: What size are brake lines?
Quote:
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