I need help with my brakes - MINI Cooper Forum
Go Back   MINI Cooper Forum > All Models & Variants > General Discussion


General Discussion Use this forum to discuss MINI topics which are not related to other forums. Posts may be moved from here to alternative forums by the moderators without notice

Mini2.com is the premier Mini Cooper Forum on the internet. Registered Users do not see the above ads.
Reply
Similar Threads
Thread Thread Starter Forum Replies Last Post
R53 brakes HELP Alexm848 General Discussion 3 Nov 1st, 2013 04:40 PM
Noisy Brakes bigry General Discussion 6 Jul 30th, 2013 10:28 AM
Cooper s jcw ... brakes are **** PapaButch Wheels, Tyres & Brakes 5 Jan 12th, 2013 11:10 PM
Squeaking brakes Challo Wheels, Tyres & Brakes 1 Dec 24th, 2012 10:40 AM
squeaky brakes?! max91 Wheels, Tyres & Brakes 7 Nov 26th, 2012 02:28 PM

 
LinkBack Thread Tools Rate Thread
  #1 (permalink)  
Old Jun 24th, 2014, 12:32 PM
MINI2 Newbie
Offline
 
Join Date: Jun 2014
Posts: 3
Local Time: 03:42 PM
Canada
I need help with my brakes

I have done the conversion from drum to disc brakes on a 1000cc 1976 Mini right hand drive with 10 inch wheels. Bled the lines so only clear fluid is coming out. And yet I need to pump the brakes at least once to get enough pressure to stop and even then its not great. I expected a whole lot more stopping power. A guy at work suggested replacing the master cylinder but I don't want to just go randomly replacing things. Any suggestions would be very helpful. Thanks
Reply With Quote
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old Jun 24th, 2014, 12:44 PM
MINI2 Master
Offline
 
Join Date: Feb 2011
Location: South london
Posts: 1,190
Local Time: 08:42 PM
United Kingdom Male
Hi ya

It does sound like the master cylinder, when the car is stationary if you pump the brake and keep pressure on it does it start to fad if it does there is a good chance it's the master cylinder, it is possible to have a internal leak as well.
From what I remember the cars that had discs had a different master cylinder bigger internals. The 1275 GT used to have had a brake servo as well

Hope this helps
Reply With Quote
  #3 (permalink)  
Old Jun 24th, 2014, 07:10 PM
MINI2 Premium Member
MINI2 Master
Offline
 
Join Date: Mar 2012
Posts: 3,056
Local Time: 08:42 PM
United Kingdom Male
You will probably need a bigger bore master cylinder if youve gone from drum to discs on a standard mini, you are having to pump the pedal to bring the pads back up to the discs as they move away a little during wheel movement then the second press is to press the pads onto the discs, if you had a larger cylinder more fluid would be pushed through in one press of the pedal.
You need to check what cylinder you have fitted at present and then see what cylinder the mini that had 10" wheels with discs had and do the same, the betting is its a larger one than you have already and maybe even had a servo too??

This is the forum for the BMW MINI by the way, you might be better going onto a classic mini forum to get your questions answered?
Reply With Quote
  #4 (permalink)  
Old Jun 25th, 2014, 01:05 AM
MINI2 Newbie
Offline
 
Join Date: Jun 2014
Posts: 3
Local Time: 03:42 PM
Canada
Awesome thanks guys. I'll look into it.
Reply With Quote
  #5 (permalink)  
Old Jun 25th, 2014, 10:45 PM
mab01uk's Avatar
MINI2 Master
Online
 
Join Date: Nov 2006
Location: London
Posts: 5,718
Local Time: 08:42 PM
United Kingdom Male
Yes you need to fit the Cooper S/1275GT master cylinder, looks the same as the drum version but is visibly taller for extra fluid capacity (used with the single circuit brakes) and had a remote servo.

If you have the later dual circuit brakes then you need to fit the 1989 onwards master cylinder and servo unit combined, used for all later Mini's with disc brakes.
Reply With Quote
Sponsored Links
Advertisement
 
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Rate This Thread
Rate This Thread:

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
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
R53 brakes HELP Alexm848 General Discussion 3 Nov 1st, 2013 04:40 PM
Noisy Brakes bigry General Discussion 6 Jul 30th, 2013 10:28 AM
Cooper s jcw ... brakes are **** PapaButch Wheels, Tyres & Brakes 5 Jan 12th, 2013 11:10 PM
Squeaking brakes Challo Wheels, Tyres & Brakes 1 Dec 24th, 2012 10:40 AM
squeaky brakes?! max91 Wheels, Tyres & Brakes 7 Nov 26th, 2012 02:28 PM

» Recent Threads
Clutch/engine problem
Today 07:33 PM
Last post by jamieeccles123
Today 07:33 PM
0 Replies, 1 Views
Key scratch to body work - Edinburgh
Today 06:31 PM
by Dudlg0
Last post by Dudlg0
Today 06:31 PM
0 Replies, 25 Views
MINI Remote Central Locking Won't Unlock
Today 05:33 PM
by KrisL
Last post by KrisL
Today 05:33 PM
0 Replies, 31 Views
help needed for choosing the tensioner
Today 05:13 PM
by tianfa1
Last post by tianfa1
Today 05:13 PM
0 Replies, 46 Views
R56 Footwell module dead
Jul 15th, 2014 04:19 AM
by miniuy
Last post by yourmate
Today 04:19 PM
7 Replies, 1,336 Views
MOT Advisories - Would you buy this car?
Today 01:34 PM
Last post by RoomForFour
Today 01:34 PM
0 Replies, 106 Views
Annoying vibration in the dashboard
Feb 14th, 2012 12:38 AM
Last post by ryanharris
Today 01:01 PM
8 Replies, 3,253 Views
LED Daytime running lights - retro fit
Apr 15th, 2014 06:08 PM
Last post by french01
Today 12:57 PM
7 Replies, 1,471 Views
What Sat nav cd do I need?
Today 11:47 AM
Last post by uk_ricky_uk
Today 11:55 AM
1 Replies, 88 Views
Paint warrenty
Today 10:16 AM
by Peter85
Last post by The Nun
Today 11:52 AM
1 Replies, 109 Views
Drivers door actuator, fitment?
Oct 6th, 2014 05:13 PM
Last post by uk_ricky_uk
Today 11:49 AM
2 Replies, 456 Views
Misfiring R55 JCW engine in 6th gear between 2k-3k RPM with throttle wide open
Oct 21st, 2014 10:30 AM
Last post by Mr Muffin
Today 11:00 AM
8 Replies, 828 Views
R56 Aux and Usb
Today 10:41 AM
by Redevo
Last post by Redevo
Today 10:41 AM
0 Replies, 98 Views
Sprintbooster for MINI Cooper R56
May 14th, 2009 04:29 PM
Last post by Gacek191
Today 07:41 AM
9 Replies, 3,501 Views
I need a tool to flash a JCW map to my 04 MCS ECU
Yesterday 09:42 PM
Last post by djtmalta
Yesterday 10:36 PM
2 Replies, 260 Views
Electric window stopped working
Jul 6th, 2006 03:48 PM
Last post by regarp
Yesterday 06:22 PM
34 Replies, 66,012 Views
Bonnet touching body
Aug 15th, 2014 03:47 PM
Last post by The Nun
Yesterday 03:58 PM
3 Replies, 480 Views
Facebook page selling mini parts around the uk
Yesterday 11:50 AM
by Alex93x
Last post by Restyle
Yesterday 03:25 PM
2 Replies, 178 Views
New Mini Cooper D - Worth the money?
Yesterday 01:33 PM
Last post by dangoodwin
Yesterday 01:33 PM
0 Replies, 166 Views
Mini Clubman Barn Doors Won't Lock
Oct 22nd, 2014 03:51 AM
Last post by WeeBad
Yesterday 01:03 PM
3 Replies, 449 Views
» Premium
» Auto Insurance
Wheel & Tire Center

Powered by vBadvanced CMPS v3.2.1

All times are GMT. The time now is 07:42 PM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.3.2