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Sealing brake lines |
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scramboy
AMC Nut Joined: Apr/12/2009 Location: new york Status: Offline Points: 456 |
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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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WesternRed
AMC Addicted Joined: Aug/03/2010 Location: Australia Status: Offline Points: 5787 |
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What are you using to make them, are they double flares?
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scramboy
AMC Nut Joined: Apr/12/2009 Location: new york Status: Offline Points: 456 |
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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
Supporter of TheAMCForum Joined: Jan/27/2013 Location: New Jersey Status: Offline Points: 2899 |
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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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Long time AMC fan. Ambassador 343, AMX 390, Hornet 360, Spirit 304 and Javelin 390. All but javelin bought new.
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pacerman
Supporter of TheAMCForum Joined: Jul/03/2007 Location: United States Status: Offline Points: 9048 |
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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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Happiness is making something out of nothing.
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scramboy
AMC Nut Joined: Apr/12/2009 Location: new york Status: Offline Points: 456 |
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Could be I used my USA made KD and a Mac flaring tool same result
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akimmet
AMC Nut Joined: Aug/02/2012 Location: Republic OH Status: Offline Points: 428 |
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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
AMC Nut Joined: Apr/12/2009 Location: new york Status: Offline Points: 456 |
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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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garweb3
AMC Nut Joined: Jan/01/2009 Location: WI Status: Offline Points: 362 |
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I bought mine from Eastwood.It works fine and I didn't have any leaks.
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1974 Javelin AMX
1980 Spirit AMX 1987 Jeep Comanche Sportruck |
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POWERSTROKER7.3
AMC Apprentice Joined: Feb/15/2012 Location: Winnebago MN Status: Offline Points: 91 |
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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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