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hey quick ?, brake line size?

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by MNorby, Mar 2, 2007.

  1. MNorby

    MNorby 3/4 ton status Premium Member GMOTM Winner

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    I don't wanna run up to the shop but does anyone know the size of brake line tubing on out year rigs, most imporatantly right out of the M/C? Just wanna confirm.
     
  2. Yukon Jack

    Yukon Jack 1/2 ton status

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    I'm redoing the lines on my 70 K5 at the moment. I'm using a 78 3/4 ton's master and those lines are 1/4". I am pretty confident from memory that the 70 K5's factory lines at that location were also 1/4".
     
  3. MNorby

    MNorby 3/4 ton status Premium Member GMOTM Winner

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    sounds great, thank you.
    How hard do you suppose it would be to convert to 3/8?
     
  4. 69TowRig

    69TowRig 1/2 ton status

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    With the appropriate adapters it's no big deal, but that is getting to be some big line for the bends you have to make to reach the stock proportioning valve, unless you are doing something else. I have a 1/4" line on the front port of my MC and it looks HUGE compared to the other lines, see below:

    [​IMG]
     
  5. Yukon Jack

    Yukon Jack 1/2 ton status

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    I agree, those 1/4" lines are a bit difficult to get bent right, really gonna be fighting the bends with 3/8" line. Why do you want to go 3/8"? Hydraulic brake lines don't care how much fluid is in the lines so the increased amount of fluid won't help you.
     
  6. MNorby

    MNorby 3/4 ton status Premium Member GMOTM Winner

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    found some parts and will ditch the stock porportioning valve in favor of a wilwood
     
  7. BUDDY

    BUDDY 1/2 ton status

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    So just get a couple of 3/8 to 1/4 adapters. Should be able to get them at your local hotrod shop. Or maybe hardware store, they're just brass fittings.

    Later,
    Buddy
     

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