Go Back   The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club Forums > Technical Help Forum
Register FAQ Image Gallery Members List Calendar Mark Forums Read
Notices

Reply
 
Thread Tools Display Modes
Old 17th June 2022, 09:54   #1
operamagorum
Loves to post
 
operamagorum's Avatar
 
BMW 330i Touring

Join Date: Jul 2015
Location: Blandford Forum
Posts: 378
Thanks: 184
Thanked 159 Times in 89 Posts
Default Brake caliper bleed nipples

Hi all
I have to change my flexible brake hoses soon and thought that I'd replace the bleed nipples with stainless.
Unfortunately, I can't source as I don't know part numbers/sizes. Are front and back the same?
TIA
Regards

Geoff
operamagorum is offline   Reply With Quote
Old 17th June 2022, 22:32   #2
xsport
Posted a thing or two
 
rover 75 club se

Join Date: Apr 2011
Location: Leicester
Posts: 1,596
Thanks: 358
Thanked 419 Times in 310 Posts
Default

i bought mine from rimmer bros. i had bought alloy nipples from ebay but they were rubbish. they were soft and snapped easily,not from over tightening , but even with a liberal coating of copper slip , would not trust them to not snap off like a carrot after being on some time. the rimmer ones are i believe a little dearer , but have two sizes , same thread but longer on the front callipers. i would go for them,but your choice ... over tightening by garages seems a problem most of the time.
xsport is offline   Reply With Quote
Old 18th June 2022, 03:03   #3
Mike Trident
Posted a thing or two
 
Mike Trident's Avatar
 
Rover 75 CDTi Saloon & Citroen C1

Join Date: Jun 2016
Location: Oakenshaw, Near Bradford
Posts: 1,618
Thanks: 385
Thanked 552 Times in 328 Posts
Default

I may be totally wrong, but are they different sizes as in 9mm spanner & 7mm spanner?
__________________
Rover 75 2.0 CDTi (131Ps) Conn SE Saloon. (Manual)
160 Remap, cruise control, electric window blind, temp gauge, Real walnut / ZT interior, FBH with GSM control.

BORN
Tuesday, 5th October 2004 @ 12:35:52
This vehicle was the 104,679th 75 to run off the production line, out of 112,381
This vehicle was the 3,318th 75 CDT Connoisseur SE (135) to be made out of 4,744
This vehicle was the 12,440th 75 in Starlight Silver (code: MBB) to be made out of 14,280 Starlight Silver 75s
Mike Trident is offline   Reply With Quote
Old 18th June 2022, 06:41   #4
roverbarmy
This is my second home
 
roverbarmy's Avatar
 
Roverless + 1.7D Sportage

Join Date: Aug 2014
Location: East Norfolk
Posts: 7,022
Thanks: 729
Thanked 2,021 Times in 1,449 Posts
Default

Quote:
Originally Posted by Mike Trident View Post
I may be totally wrong, but are they different sizes as in 9mm spanner & 7mm spanner?
I think that it depends on the manufacturer. They are different lengths on the front and rear (different part numbers). The longer ones seem to shear off more easily if they are rusted in.

See lower down page:-

https://rimmerbros.com/ItemList--Rov...ipers--m-21281
__________________
Oil in my veins!

Last edited by roverbarmy; 18th June 2022 at 06:43..
roverbarmy is offline   Reply With Quote
Old 18th June 2022, 10:14   #5
SD1too
Doesn't do things by halves
 
SD1too's Avatar
 
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model.

Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,265
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
Default

Quote:
Originally Posted by operamagorum View Post
... thought that I'd replace the bleed nipples with stainless.
Hi Geoff,

I can understand your thinking but of course the thread in the caliper will still be prone to rust. The way I deal with the problem is as follows:
  1. Remove the nipple and clean its thread with a wire brush, flushing away all debris afterwards. Use a light lubricant of your choice sparingly and check by hand that the nipple's thread engages with the caliper thread smoothly.
  2. Refit and gently tighten until the flow of brake fluid stops and no further.
  3. Lastly and most importantly, coat the remaining exposed thread and the spanner flats with Waxoyl or equivalent.

I haven't had any trouble since adopting this method for the standard factory nipples.

Simon
__________________
"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.
SD1too is online now   Reply With Quote
Old 18th June 2022, 12:57   #6
xsport
Posted a thing or two
 
rover 75 club se

Join Date: Apr 2011
Location: Leicester
Posts: 1,596
Thanks: 358
Thanked 419 Times in 310 Posts
Default

Quote:
Originally Posted by Mike Trident View Post
I may be totally wrong, but are they different sizes as in 9mm spanner & 7mm spanner?
Yes i have come across this before, where the spanner size differs. however the thread size was the same for both. socket spanner seams the better for grip than a hexagon or ring spanner to undo them , i have found. it keeps the nipple square to the socket better on very stubborn threads whilst undoing them. with the ordinary spanner you can apply force but it tends to be at an angle if your not careful and can snap them off.
xsport is offline   Reply With Quote
Old 18th June 2022, 13:51   #7
Arctic
Give to Learn
 
Arctic's Avatar
 
Freelander 2

Join Date: Aug 2010
Location: West Midlands
Posts: 18,650
Thanks: 1,155
Thanked 6,407 Times in 3,874 Posts
Default

I like to add a little ceramic brake grease to the nipple threads, i purchased the nipples from a local car store, you can then see what you are getting.
1

The shop had a choice of either 7mm or 9mm spanner fitting i went for the 9mm as above a bit more to get a bite on.

2

3
__________________
Arctic
Givology Learn to Give
Everything is Achievable

ad altiora tendo.

Check out our Nano meet dates
http://www.midlandsnanomeets.co.uk/

http://www.the75andztclub.co.uk/index.php?thepage=howto

" You do the work , we supply the expertise "
Arctic is online now   Reply With Quote
Old 19th June 2022, 14:39   #8
xsport
Posted a thing or two
 
rover 75 club se

Join Date: Apr 2011
Location: Leicester
Posts: 1,596
Thanks: 358
Thanked 419 Times in 310 Posts
Default

failing a lack of ceramic grease to hand, i have used red rubber grease applied to the threads.it will seal up the top ring area of the threads where exposed to water and gives a good seal. the rubber caps that fit over the nipple are also important to keep out dirt, A lot of folks dont bother with them but they are there for a reason. great photos again Arctic . thanks.
xsport is offline   Reply With Quote
Old 22nd June 2022, 05:25   #9
Mike Noc
This is my second home
 
Mike Noc's Avatar
 
Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4.

Join Date: Jul 2009
Location: Hampshire
Posts: 11,531
Thanks: 3,470
Thanked 3,119 Times in 2,247 Posts
Default

Each to their own - I've always used Copaslip on brake nipples, and don't overtighten them either.
Mike Noc is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 12:45.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © 2006-2023, The Rover 75 & MG ZT Owners Club Ltd