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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 6:42am
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 7:07am
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 7:23am
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 7:45am
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 8:09am
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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 8:02am
If you are flaring your own lines, you are doing something wrong if the new flares will not seal. Cheap or worn tool? Joe
Happiness is making something out of nothing.
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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 8:19am
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 9:31am
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 9:54am
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 10:19am
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 11:25am
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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