weeping nipples :-0

[flymo]

my nipples are weeping, what can I do ?

I have a brake bleed nipple that appears perfectly sound and clean but it seems to weep fluid up the threads. Anybody know any tricks to sort this?

I've seen a paste similar to thread lock before now thats intended for bleed nipple threads. Any idea what it is and where I might get some?

[jambo]

The bleed nipple should have a seal in the caliper that it goes into, is that in good nick?

tried using a bit of PTFE (teflon) tape round the thread, when you put the bolt on?

Matt

I had this problem so i just nipped up the nipple Its ok now

[flymo]

Yeah the seals 'appeared' to be fine but I may need to remove and check again. I have some replacement hoses coming that I need to fit anyway so thats no problem.

I like the PTFE idea, especially for the brake bleeding phase to save fluid leaking everywhere.

I've had new nipples supplied before that came with a type of threadlock compount, wondered if anybody had seen/used this before.

The nipple seals via the conical end, make sure the end and its recess is clean. Putting PTFE (or whatever) round the threads is like sticking a bung in the end of an overflow pipe as something is overflowing … it might stop it coming out for a bit, but its not solving the problem

Originally Posted by flymo_racer

I like the PTFE idea, especially for the brake bleeding phase to save fluid leaking everywhere.

Everytime I touch my nipples (oo-eer) I take the PTFE off & put new stuff on there. Habit I suppose.

[flymo]

Originally Posted by Blue_SV650S

The nipple seals via the conical end, make sure the end and its recess is clean. Putting PTFE (or whatever) round the threads is like sticking a bung in the end of an overflow pipe as something is overflowing … it might stop it coming out for a bit, but its not solving the problem

Yeah I understand that, I think where the ptfe might be useful is during brake bleeding itself. As soon as you undo the nipple each time you usually get fluid escaping up via the thread, PTFE might well stop this. But once bled yeah the pressure should be totally contained by the nipple seal itself.

Originally Posted by flymo_racer

Yeah I understand that, I think where the ptfe might be useful is during brake bleeding itself. As soon as you undo the nipple each time you usually get fluid escaping up via the thread, PTFE might well stop this. But once bled yeah the pressure should be totally contained by the nipple seal itself.

So it seals ok, just weeps when you bleed right?

If so - what are you worried about?!!?

[flymo]

Originally Posted by Blue_SV650S

So it seals ok, just weeps when you bleed right?

If so - what are you worried about?!!?

No I think we are talking about two different things in the thread. My actual problem is that the system is weeping through one front nipple and the rear does the same when everything is supposed to be sealed shut and the nipples are tightly seated. For that part then there must be something wrong with the seal itself which I'll have to check out.

The other side of this is that I think PTFE tape (or this mystery compound that I cant identify) can be useful to prevent fluid ****ing all over the place when bleeding the calipers.