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Bleed nipple seized and snapped off

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rk8479
Two Stroke Sniffer



Joined: 12 Jul 2013
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PostPosted: 22:52 - 08 Nov 2014    Post subject: Bleed nipple seized and snapped off Reply with quote

Bleed nipple on rear brake snapped off and rest is seized in the caliper, i have got a banjo with bleed nipple inside that and after bleeding the brakes a few times the brake works but only if the pedal is pushed all the way down and it only gives a slight brake effort, im guessing the air up in the little hole to go into the old bleed nipple has air inside, what should be used to plug it? i was thinking of epoxy resin but im unsure
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Pete.
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PostPosted: 23:05 - 08 Nov 2014    Post subject: Reply with quote

Hold your caliper so that the bleed nipple is highest and push the pistons back in. Any air should be expelled with the oil.
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cresad
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Joined: 02 Jun 2014
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PostPosted: 23:07 - 08 Nov 2014    Post subject: Reply with quote

Hi , I take it your on about using the epoxy on the outside of the caliper - I hope - in the bleed screw opening ?
There's no need , it's the bottom of the screw that shuts the air/fluid off , any air trapped will be inside the caliper. There is a way of bleeding it using the banjo but it would either have to be at the top of the caliper or turn the caliper so it is making sure that the pads stay with the disc between them.

The best and only proper way forward is to drill the rest of the bleed screw out yourself / get it done or a new caliper.

Adam
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rk8479
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Joined: 12 Jul 2013
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PostPosted: 23:14 - 08 Nov 2014    Post subject: Reply with quote

Yeah, and i ment use the epoxy or something similar inside the caliper to cover the hole towards the bleed nipple so no air can get up there to be trapped before bleeding
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cresad
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Joined: 02 Jun 2014
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PostPosted: 23:39 - 08 Nov 2014    Post subject: Reply with quote

No , No , No don't put anything like that inside the caliper , you could loose all braking. It's either repair or replace .

Adam
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Nash GT
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Joined: 12 Sep 2014
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PostPosted: 00:17 - 09 Nov 2014    Post subject: Reply with quote

cresad wrote:
No , No , No don't put anything like that inside the caliper , you could loose all braking. It's either repair or replace .

Adam


That !

Replace fella even if it's with a second hand item.
It is NOT worth the risk
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Llama-Farmer
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Joined: 23 Jan 2012
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PostPosted: 00:42 - 09 Nov 2014    Post subject: Reply with quote

Get a spare caliper and refurb it, or get a refurbed one. See if they'll take yours as an exchange, but be sure to explain the situation, they won't return your deposit if they're expecting a sound caliper.

If they won't, get a spare caliper outright and then see about drilling the bleed nipple out of yours and refurbing it. Always handy to have a spare that you can refurb off the bike in your own time without making the bike unusable.
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monkeybiker
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PostPosted: 01:09 - 09 Nov 2014    Post subject: Reply with quote

Another vote for replace caliper. Does piss about with brakes, do it properly.
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andys675
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Joined: 08 Feb 2007
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PostPosted: 12:31 - 09 Nov 2014    Post subject: Reply with quote

if the bleed nipple broke off without moving then a banjo bolt bleed nipple will be fine, if you've had the fluid system open then you must push the pistons behind the pads all the way into the caliper before you start bleeding the brakes or it will take forever or just won't work
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Pete.
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PostPosted: 12:41 - 09 Nov 2014    Post subject: Reply with quote

andys675 wrote:
if the bleed nipple broke off without moving then a banjo bolt bleed nipple will be fine, if you've had the fluid system open then you must push the pistons behind the pads all the way into the caliper before you start bleeding the brakes or it will take forever or just won't work


Precisely. All that's necessary is that the air comes out. You could drill and tap a hole anywhere and seal it with a bolt just to get the air out. Brake fluid pressure is negligible when working on a bolt end.

There's no need to worry about air trapped in the blocked port.
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132.9mph off and walked away. Gear is good, gear is good, gear is very very good Very Happy
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Islander
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PostPosted: 17:55 - 09 Nov 2014    Post subject: Reply with quote

Yup, both of Pete's replies are spot on as usual. No need to do anything as drastic as replace the caliper - you only need to bleed the air out. Thumbs Up
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MaybeGuy
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PostPosted: 22:46 - 09 Nov 2014    Post subject: Reply with quote

Why don't you just drill it out? As far as snapped bolts are concerned it's probably one of the easiest to do provided you don't go too deep. It's even got a pre drilled pilot hole.
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Fizzer Thou
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PostPosted: 11:20 - 10 Nov 2014    Post subject: Reply with quote

Pete. wrote:
Hold your caliper so that the bleed nipple is highest and push the pistons back in. Any air should be expelled with the oil.


Surely it is better to hold the caliper at the lowest point so that any trapped air rises,so that when the piston is pushed back into the caliper body the air will escape via the master cylinder reservoir Thumbs Up
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Pete.
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PostPosted: 21:48 - 10 Nov 2014    Post subject: Reply with quote

Fizzer Thou wrote:
Pete. wrote:
Hold your caliper so that the bleed nipple is highest and push the pistons back in. Any air should be expelled with the oil.


Surely it is better to hold the caliper at the lowest point so that any trapped air rises,so that when the piston is pushed back into the caliper body the air will escape via the master cylinder reservoir Thumbs Up


Yes if he didn't say he had a banjo bleed nipple fitted. Holding the caliper with the bleed nipple highest and pushing out the pistons will expel air from the caliper out of the bleed nipple. Similarly pumping the lever with the bleed open will expel air from the line out of the nipple.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good Very Happy
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