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  1. #1
    Registered User Chromium4500's Avatar
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    Question Hard Brake Lines Rusted - Need Sizes Please

    One of my hard brake lines burst yesterday (#7 in the diagram) and it looks like #8 isn't long for this world. OEM hard lines appear to be discontinued and unavailable. I'd like to get some stainless steel tubing and make my own replacements for these two lines, plus have extra and the proper flaring tool on hand for future breakage. Living in the NE means rust is just part of life.

    I'm probably going to pickup a kit like this https://www.amazon.com/4LIFETIMELINE.../dp/B08RH8VVPJ

    From other posts I believe that the hard brake lines in the EP3 is 3/16". It that is correct, my only question is regarding the tub nut size that screws into the distribution block and the booster. Does anyone have information on what size tube nut is required? If I'm wrong about the hard brake line size diameter a correction on that would also be appreciated.
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    Last edited by Chromium4500; 11-27-2022 at 10:53 AM. Reason: pic too small

  2. #2
    Registered User Chromium4500's Avatar
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    Follow up question now that I'm looking at the flaring tools. I'm assuming our brake lines are standard 45 degree flare. Are they going to be single or double flare? Dang these tools are expensive!

  3. #3
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    Nov 2022
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    Mississippi
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    10.00mm x1.0 thread pitch bubble flare for the master cylinder ports.

    https://www.linestogo.com/civic-brak...gaAoPMEALw_wcB

    You might be better off just ordering a premade line kit, especially if you want stainless because the flaring tools required are expensive, the normal double flare tool you get at the parts store will break on the 1st try.


    Also keep in mind the stock material lasted almost 20 years.

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