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How big of brake line?

Discussion in 'Chevy Trucks' started by 1977/85scottspecial, Aug 20, 2003.

  1. 1977/85scottspecial

    1977/85scottspecial Member
    from Indiana
    Messages: 60

    I am to the point where I need to install my brake and fuel lines. I will probably use 3/8 fuel line but what size brake line should I use? Its a 3/4 ton 4x4 and will have either 35 or 36" tires with all four discs. I am talking the hard lines not from the brake itself.
  2. Rick Loncosky

    Rick Loncosky Senior Member
    from 17557
    Messages: 102

    From the distribution block up front, it's 1/4" steel tubing back the right side to the rear hanger where it connects to the rubber flex hose. It splits at the other end of the hose and is 3/16" steel to each wheel cylinder. It's 3/16" steel tubing to each front wheel, where it attaches to the rubber hoses to the calipers. I'm almost sure it's 1/4" from the master to both inlets of the block. Good Luck and happy bending.;)
  3. 1977/85scottspecial

    1977/85scottspecial Member
    from Indiana
    Messages: 60

    Thanks, Thats what I was thinking but just thought I would make sure.
  4. snowjoker

    snowjoker Senior Member
    Messages: 283

    1/4 inch is what i used on my truck sunday to go all the way to the back 11 feet worth :rolleyes:
  5. wyldman

    wyldman Member
    Messages: 3,265

    Like Rick said,1/4" most of the way,and 3/16" out to the wheel cyls.

    Might as well do the flex lines while your at it.

    You will need 5/16" for the fuel return line,if your truck is equipped with it.
  6. 1977/85scottspecial

    1977/85scottspecial Member
    from Indiana
    Messages: 60