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Trouble with bleed nipples

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BelleBot
Nova Slayer



Joined: 03 Sep 2009
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PostPosted: 20:43 - 06 Jun 2010    Post subject: Trouble with bleed nipples Reply with quote
Currently trying to bleed the brakes on my bike, but it just isn't working. The trouble is, when I loosen the bleed nipple by only 1/4 turn, brake fluid leaks out of the sides of the nipple as well as the tip. Tighten it, and nothing can come out.
Any suggestions for what I can do, as I can't bleed the brakes as it currently is. I'm at a bit of loss as to what to do, I've tried swapping the bleed nipple for a new one, but I still get the same problem.
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.....
Quote Me Happy



Joined: 15 Jan 2005
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PostPosted: 20:51 - 06 Jun 2010    Post subject: Reply with quote
A picture of your nipples might help Shifty
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0l0dom0l0
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Joined: 21 Oct 2009
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PostPosted: 21:00 - 06 Jun 2010    Post subject: Reply with quote
what about if you put some of the tape they use to seal raditors on. just a small layer, might help to tighten the thread up? i think its pv tape or something?
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0l0dom0l0
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PostPosted: 21:02 - 06 Jun 2010    Post subject: Reply with quote
change my mind, its PTFE tape!
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daveg
Derestricted Danger



Joined: 03 Jun 2010
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PostPosted: 21:09 - 06 Jun 2010    Post subject: Reply with quote
could use ptfe tape or threadlock(lock and seal) this will do the same job, but screw nipple in and leave to harden for couple of minutes, done this on my calipers.
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sniff6
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Joined: 23 Apr 2010
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PostPosted: 22:11 - 06 Jun 2010    Post subject: Reply with quote
Joe wrote:
A picture of your nipples might help Shifty


Nope forget the tape , I like joe's idea best
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cb1rocket
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Joined: 30 Jan 2010
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PostPosted: 23:08 - 06 Jun 2010    Post subject: Reply with quote
you don't even need to turn it a quarter of a turn - thats alot!

you only need to turn it about 1/8 or even 1/16 of a turn.

Only undo until a tiny amount, and your know you have undone enough when you can pull the brake lever all the way in
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Noxious89123
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Joined: 10 Jun 2007
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PostPosted: 23:10 - 06 Jun 2010    Post subject: Reply with quote
It doesn't matter if fluid leaks through the threads when your bleeding. So long as it seals ok and nothing leaks when it's tightened up it'll be fine.

Just remember to clean up any fluid that gets onto the caliper, and close the nipple before the fluid stops flowing out, else you might get air sucked back in.
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BelleBot
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Joined: 03 Sep 2009
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PostPosted: 08:46 - 07 Jun 2010    Post subject: Reply with quote
Cheers guys, I'll have another bash at it today. Might buy a vacuum bleeder kit as bleeding brakes the traditional way is doing my head in.
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temeluchus
World Chat Champion



Joined: 01 Oct 2008
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PostPosted: 10:16 - 07 Jun 2010    Post subject: Reply with quote
BelleBot wrote:
Cheers guys, I'll have another bash at it today. Might buy a vacuum bleeder kit as bleeding brakes the traditional way is doing my head in.


Big catheter syringe and some hose would do the trick.
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MarJay
But it's British!



Joined: 15 Sep 2003
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PostPosted: 10:33 - 07 Jun 2010    Post subject: Reply with quote
BelleBot wrote:
Cheers guys, I'll have another bash at it today. Might buy a vacuum bleeder kit as bleeding brakes the traditional way is doing my head in.


Fluid leaking past the threads on the bleed nipple is more of an issue with a vacuum bleeder than it is for normal bleeding methods.
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cb1rocket
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Joined: 30 Jan 2010
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PostPosted: 11:42 - 07 Jun 2010    Post subject: Reply with quote
Get a massive 60ml syrigne or bigger, fill with fluid sucked out from the bottle and pump it in from the caliper end.

works every time for me, then proceed to bleed as normal

then bungee up the front brake lever and leave over night
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Old Thread Alert!

The last post was made 16 years, 96 days ago. Instead of replying here, would creating a new thread be more useful?
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