Fluid seeping from bleed screws.

[reefer]

so what do the honda mechanics do when they change the fluid in the brake system to over come the problem?:dunno: :h :h

 

[reefer]

well having changed the fluid on me bird..im also getting fluid leaking from the bleed screws:B
just giving the front screws an extra nip has sorted the problem..however they are still seeping on the rear unit
what the fook do i do...and why the fook does this happen on a ?8500 fooking superbike
suggestion needed pre spain trip..ie fooking ASAP!

 

[Supabird1100]

What About...............

Superglue ?????? :}

 

[Jaws]

Originally posted by MrFlibbleUK
Have spoken to 321 ignition who supplied my delinking kit and they reckon this seepage is very common on the blackbird, especially one my age (1997) their solution was to use loctite on the bleed nipples to essentially make the correct seal. Although loctiting bleed nipples is considered a no no they say they do it to all the bikes that come through as its a blackbird with the older birds and they have had no problems whatsoever.

Am attempting it now so will keep you posted.

I have always had considerable respect for Seb and think his stuff is first class.. However.....................
I work almost excusively on Birds and have never ever seen a bleed nipple weep..
If someone brought a bike to me for MOT like that I would slap a red ticket on it.. not just a failure, but 'feck off and get a trailer cos you aint riding that on a public road ! ' ticket..

I will not guess as to the cause of the problem, but will say that I am 100% sure that if you bought the kit ( inc nipples ) from Seb then they WILL be the right ones... About the only thing I can think of is that at sometime along the way the nipples have been severely over tightened and the seats have been damaged.

Sorry Seb, I appreciate you are far more of an expert with this particular situation than me, but I gotta say my bit mate :blush:

 

[reefer]

hi john

they are standard bird bits..i was just changing the fluid
the nipples wernt over tightened..but still seep through on the rear..would new nipples sort out the problem do you think??

cheers

 

[MrFlibbleUK]

I also tried new ones...

I also bought new bleed nipples....exactly the same seeping...even put the old ones in. Since I followed what seb has said they have been spot on.

 

[reefer]

so what did you do?..ptfe tape or sealing compound etc??

cheers
simon

 

[MrFlibbleUK]

I used some nutlock..

 

[Jaws]

There is actually some proper stuff you can get ( same makers as of loktight) which is what is often used.. Buggered if I can remember the name of it though..
I would be inclined to order a new set of nipples from Seb anyways mate.. cant hurt !

 

[reefer]

hi john

yeah i know the stuff your on about.i got a bottle of it at work its used for pressure pipe threads for air and hydrolics etc

but its just so fookin annoying why it happens in the first place
mine seems to be coming up the centre of the bleed valve!
so im just gonna cake the lot in loctite..dont matter for 2 years till it comes to changing the fluid again!

 

[xx_guru]

Leaky Nipples?

Hi Reefer (and others in the mystical quest for non-leaky nipples!),

I've read the comments above and just wanted to add something (brief this time):

We use a specific compound for brake components the name of which I can supply if you mail me at the shop made by a company called 'Vanchem'. You will be okay using either a 'stud and bearing fit' or a 'loctite' thread sealant though. Please ensure you don't pour it down into the caliper but just use it on the thread of whatever nipple you have to hand (oooer missus!).

Now then, not wanting to sound like a total wanker, but.....we always take small sections of workshop blue paper (kitchen roll will do), roll them up into little sharp points and insert them into each nipple after each one has been completely bled. You may find you have to do this a couple of times per nipple.

Why? (you may ask....) This absorbs all surplus fluid within the nipple chamber and stops it oozing out (making you think that the nipples are STILL oozing when they actually are not now you've sealed them!!).:bang:

New nipples are next-to-never necessary as we rarely find ones badly-enouch corroded internally to warrant this expense. Rest-assured however, that these will also leak unless sealed as the problem lies within the Nissin casting and not the nipple thread pitch depth.

I hope I haven't bored everyone to death but hope that the above helps you get your bike sorted for your trip.

Regards to all - see you very soon! (Exciting eh?)

Off to watch '24' now.........

Seb.

 

[R2B2]

I wonder...

... if this leak business could be down to a slight mismatch in the angle of the seat and the corresponding angle on the nipple end...? This could be checked if someone had a spare caliper.

One way to physically view the relationship between the two when they are assembled would be to...


Have it x-rayed with the nipple in place, just slightly pinched up. It would have to be clean and dry of course, to reveal any useful information and I'm sure this could be done by some of the Oil related engineering firms over Gt Yarmouth way.

They have this type of equipment for checking for hairline cracks and material flaws in welding etc, and the degree of area being scrutinised can be zoomed in on.

Seems abit excessive I know, but could provide the solution..!

 

[reefer]

cheers seb

ill be cleaning me nipples before setting off to work tomorrow..you may get a call in the afternoon from some mad man with leaking nipples:} ...errr whats the number there??:beer:

 

[xx_guru]

Contact

Hi Reefer,

The national rate number for nipple talk........hmmm..

01793 321 321

I'll be around so just ask for me directly.

Cheers,

Seb.

By the way - I think Rob P's idea is a good one - and as my background is a medical one I will try to get this sorted for a definitive answer in the near future.

 

[reefer]

seb..cheers for your time on the blower this morning..i done as you said and ill check it in the morning :bow:

 

[reefer]

seb..cheers for your time on the blower this morning..i done as you said and ill check it in the morning :bow:

 

[ALonaBIRD]

Gettin the calliper X-rayed wouldnt be cheap i reckon. Its a fairly specialised form of inspection.
I work in that kinda area but mainly use dye penetrant or magnetic particle inspection. If you like i can give you an idea on what kinda costs you are looking at though.
The company i work for have people for ultrasound and eddy current inspection as well as dye and magnet but none of us are qualified in in x-ray so we subcontract that out.

 

[R2B2]

AlonaBird...

... that would be good to get an idea on cost of x-ray.

I'm not sure if MPI would help 'cos that would show us we had a leak, but would not have the detail to show us why, I'm thinking...

 

[Bubba]

During the duration of this thread I too bled me brakes and noticed a little fluid dribbling from nipples. I told the missus and she slipped in a couple of breast pads and all was dandy!

As fer the bike?? I'm one of the "I'll keep and eye on that" kinda guy. Noticed the damp patch on the caliper wasnt getting any bigger when the lever was pulled in and came to the conclusion that is wasnt coing out under pressure but looked more like seepage. Reading the Guru's post about capillery seepage has confirmed this.

Cheers guys.

BTW, brakes work OK now and all if fine in the world

 

[D.S.]

[XX guru QUOTE]Off to watch '24' now.........[/QUOTE]

aha, another fan hey? Don't forget Sopranos and NYPD Blue tonight :-: