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Old 04-26-2011, 06:17 PM
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brake line sealant

you guys know of any sealant you can use on leaking brake line fittings?

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Old 04-26-2011, 06:59 PM
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NO absolutley not. They are designed to seal by means of compression on the flared surface as is is compressed between the tubing nut and the fitting. If it leaks tighten it some more. If it doesnt seal or gets worse then it is cracked or split or something. It will need reflared.
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Old 04-26-2011, 07:03 PM
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If it is the fitting to a brake caliper, it may need a caliper washer if it is missing or a new one if tightened to spec and still leaking.
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Old 04-26-2011, 07:56 PM
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Hi
Well since no one put a quarter in the crystal ball , you'll have to tell us in detail what is leaking. And then we can give you good advice on how to repair the problem .
Rich
PS Brake line sealer
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Old 04-26-2011, 08:53 PM
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***cringe***
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Old 04-26-2011, 09:21 PM
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LAtech there is another way

. If the flare is failing to seal, get a twist of yard dabbed in liquid teflon threadloc. Make a ring of this rope, behind the flare beneath the fastner pressing the seal. Should work great for fuel, nitrous, and brake lines. This is a comon repair for old lines and compression fittings.
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Old 04-27-2011, 02:20 PM
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Quote:
Originally Posted by atcoed
you guys know of any sealant you can use on leaking brake line fittings?
Never used any sealant before on the brake lines.


Cole
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Old 04-27-2011, 03:23 PM
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dab of locktite

In the 70's Ford used a drop of locktite in the factory on some of the fittings. I don't know which spec of locktite they used. and whether it was in cars or light truck F series.
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Old 04-27-2011, 03:41 PM
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Quote:
Originally Posted by timothale
In the 70's Ford used a drop of locktite in the factory on some of the fittings. I don't know which spec of locktite they used. and whether it was in cars or light truck F series.
Learned something today.


Cole
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Old 04-27-2011, 04:20 PM
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Locktite on threads wont seal an inverted flare.the flare itself seals where it comes into contact with the cone inside the female part of the fitting. Locktite just keeps the nut from coming loose and indicates tampering if necessary.


National Highway Safety does not sanction using any sealer where a mechanical seal is required. It is against the law in pennsylvania and north carolina where they have safety and emission inspection.
I highly doubt any sealer would seal a brake line fitting that leaked. Even if it did I would not do it as it may kill somebody, beit the driver or another motorist. Trying to get around repairing it correctly as desinged by engineers is foolish at the least.
Fuel lines and nitrous are pipe thrtead or AN fittings. I use sealer on pipe threads.
I have never worked with AN fittings.
If a copper washer leaks on a banjo fiiting then you need new washers or thicker washers.Not sealer
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Old 04-27-2011, 04:22 PM
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I'm with you on the banjo fitting but i really never have used or seen sealant use on the brake lines before either. IMHO


Cole
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Old 04-27-2011, 05:35 PM
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Sealant and Teflon tape is a no-no on brake line fittings.

Vince
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Old 04-27-2011, 05:37 PM
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This horse has been beaten to death many times before. Bottom line the flare is the seal, not the threads. If it leaks the flare or the flare seat is no good or of the wrong style
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Chet
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Old 04-27-2011, 05:51 PM
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My criteria:
If it's a flared or bubble fitting, no sealant. Repair or replace.
If it's a straight fitting, a copper or aluminum washer
If it's a pipe fitting, it might get some Teflon tape if it oozes.

Ford used a blue thread locker of some sort on fittings into the wheel cylinders or calipers. My F350 had enough on the 4 caliper fittings to cause me to turn the air blue as well (also on the attaching bolts to the spindle bracket )

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Old 04-27-2011, 10:54 PM
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Any time I can't get a flared or bubbled fitting to seal from tightining, I take it apart to inspect. 90% of the time, the flare is cracked. The other 10% of the time the fitting was crossed/ bad threads. 100% of the time results in redoing the flare possibly with a new fitting..
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