Caliper nipple

AdrianC

stranger12 wrote: »

When people say rebuild, they are normally refering to seal kit

That is done but my issue is bleeder nipple

A proper rebuild will look at everything.

BeenThroughItAll

Posted this on the other thread before I realised it was a duplicate, so much of this has been said already.


It's 'galvanic corrosion'.



You may get away with retapping, but you'll need to be very careful not to damage the bleed nipple hole tapered seat, so you'll need a flat-ended plug tap not a taper tap.


If that doesn't work, again you'd need to be very careful if drilling and helicoiling not to damage the seat.


If it were me, I'd buy a new caliper. Fixing the old one is way too difficult to do properly without a machine shop.

stranger12

Question i have is how can i find a machining shop?

I am happy to pay a shop if there is a machining shop and it will be cheaper than £300

AdrianC

Have you actually investigated the cost of having them properly reconditioned?

BiggRed don't give a price on their site, but BCS do -
http://www.brakecaliperspecialists.uk/brake-caliper-refurbishment/brembo/
£130 for a pair of four-pot Brembo calipers.

tedted

( Potential additional charges include engineering work including bolt extractions, re-threads, helicoils, making inserts to name a few.)
bit further down on there bwebsite

AdrianC

Sure, but still a big chunk less than £300 each.

molerat

AdrianC wrote: »

Sure, but still a big chunk less than £300 each.

Indeed. Plus the caliper will be "as new". Giving it to a random engineering workshop, although they will re-do the damaged thread properly, will probably still result in the caliper needing an overhaul as the seals etc will likely be damaged in the process.

Jackmydad

molerat wrote: »

Indeed. Plus the caliper will be "as new". Giving it to a random engineering workshop, although they will re-do the damaged thread properly, will probably still result in the caliper needing an overhaul as the seals etc will likely be damaged in the process.

I wouldn't do it myself without pulling the caliper apart to be able to clean it out properly.
A specialist firm has to be the way to go. They're going to have the right kit to do the job properly. I imagine you have to jig the caliper up on a drill press or similar to make sure the thread is cut square to the seat.

stranger12

just an update, I am sending it to this firm which will insert a metal plug that can be died to accept the correct nipple

It is sort of like helicoling but done in machine shop.

would anyone here rate helicoil ? the thread seems very cheap and soft. I can't imaging that been very strong

z1a

stranger12 wrote: »

just an update, I am sending it to this firm which will insert a metal plug that can be died to accept the correct nipple



It is sort of like helicoling but done in machine shop.

would anyone here rate helicoil ? the thread seems very cheap and soft. I can't imaging that been very strong

Tapped, not "died"

Helicoils are retaining most of the screws on any plane you'll be flying on.