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Sealing brake lines

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scramboy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote scramboy Quote  Post ReplyReply Direct Link To This Post Topic: Sealing brake lines
    Posted: Jan/13/2018 at 7:42am
I'm making new brake lines for my Scrambler and I'm having a hard time getting them to seal. I really have to crank down on the sealing nuts for it to stop weeping and I'm uncomfortable withe the amount of torque that was required. Also I disassembled a couple of fittings and found that the cone inside the brass connectors is scored and flattened, is that normal for that type of connection? Thank you, Scramboy.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote WesternRed Quote  Post ReplyReply Direct Link To This Post Posted: Jan/13/2018 at 8:07am
What are you using to make them, are they double flares?
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scramboy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote scramboy Quote  Post ReplyReply Direct Link To This Post Posted: Jan/13/2018 at 8:23am
Yes they are, what I'm trying to get at is the quality of the lines and fittings sub-par like everything else today. Do I have to order specific high quality components? Is the "Autozone stuff" just offshore crap?
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george w View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote george w Quote  Post ReplyReply Direct Link To This Post Posted: Jan/13/2018 at 8:45am
There's a lapping tool made specifically to solve brake line leaks. It's advertised in the Street Rod mags. It's called the "Surseat Line Lapper".
It's sold by koultools. www.koultools.com / 928 854-6706

Edited by george w - Jan/13/2018 at 9:09am
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pacerman View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote pacerman Quote  Post ReplyReply Direct Link To This Post Posted: Jan/13/2018 at 9:02am
If you are flaring your own lines, you are doing something wrong if the new flares will not seal. Cheap or worn tool? Joe
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scramboy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote scramboy Quote  Post ReplyReply Direct Link To This Post Posted: Jan/13/2018 at 9:19am
Could be I used my USA made KD and a Mac flaring tool same result
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Post Options Post Options   Thanks (0) Thanks(0)   Quote akimmet Quote  Post ReplyReply Direct Link To This Post Posted: Jan/13/2018 at 10:31am
I always had trouble making good double flares until I got myself an inline hydraulic flaring tool. An inline flaring tool makes a much better flare. A hydraulic model isn't necessary unless you want to attempt stainless.

However, nothing will help a bad fitting. The cone inside the fitting is where the sealing occurs. If it is scored or flattened it won't seal without over-torquing the tube-nut.
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scramboy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote scramboy Quote  Post ReplyReply Direct Link To This Post Posted: Jan/13/2018 at 10:54am
I've done some experimenting this morning I discovered that the factory flares on the straight lengths of tubing I bought seal adequately the ones I flared suck with 2 tools.They even distort the cone inside the fitting.I realize I may need a new flaring tool, what's a good one to get?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote garweb3 Quote  Post ReplyReply Direct Link To This Post Posted: Jan/13/2018 at 11:19am
I bought mine from Eastwood.It works fine and I didn't have any leaks.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote POWERSTROKER7.3 Quote  Post ReplyReply Direct Link To This Post Posted: Jan/13/2018 at 12:25pm
I use a OTC brake flair tool set, use a tube cut tool for nice straight cuts and a fine tooth hand file for a good bevel on the end, then I lube the mandrel and cone before I proceed to make the double flair. Works every time for me. I've gotten better over the years of making my own brake lines, practice helps alot.
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