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: 09:52 AM
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: 1,187
Local Time: 02:52 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: 3,029
Local Time: 02:52 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: 09:52 AM
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
Offline
 
Join Date: Nov 2006
Location: London
Posts: 5,702
Local Time: 02:52 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
2006 1.4 Mini One D Idle Knocking Noise Just purchased.
Mar 4th, 2013 08:20 PM
Last post by vlado.rekso
Today 01:46 PM
1 Replies, 1,776 Views
how do i reset the airbag light?
Sep 1st, 2006 08:43 PM
Last post by jamesslittle
Today 01:43 PM
7 Replies, 40,553 Views
Bristol Chat
Mar 6th, 2006 03:49 PM
Last post by jamesslittle
Today 01:40 PM
15 Replies, 313 Views
Mini one speakers
Sep 22nd, 2014 11:50 AM
by Giddzz
Last post by Widgey
Today 01:35 PM
1 Replies, 182 Views
de-cat my miltek or remove resonator?
Aug 18th, 2014 08:52 PM
Last post by marque
Today 01:14 PM
3 Replies, 513 Views
Recommended Spark plugs?
Today 05:54 AM
Last post by marque
Today 01:11 PM
1 Replies, 83 Views
Need advice on what a mechanic "said "
Sep 24th, 2014 05:55 AM
Last post by marque
Today 01:07 PM
5 Replies, 1,813 Views
Mini Cooper S Parts program
Today 02:46 AM
Last post by marque
Today 01:06 PM
1 Replies, 135 Views
Resources
Today 01:00 PM
by Garrus
Last post by Garrus
Today 01:00 PM
0 Replies, 1 Views
Were these rims worth it?
Sep 3rd, 2014 08:17 PM
Last post by Garrus
Today 01:00 PM
10 Replies, 989 Views
2nd hand mini experience
May 22nd, 2014 05:57 PM
Last post by Garrus
Today 12:58 PM
7 Replies, 1,588 Views
Changing Battery in the Key???
Apr 20th, 2007 02:54 PM
Last post by Garrus
Today 12:21 PM
13 Replies, 52,135 Views
Mini Cooper 1.6 R56 oil in spark plug tunnels
Yesterday 09:59 AM
Last post by i-CONICA
Today 12:14 PM
1 Replies, 174 Views
Standard radio plays MP3?
Nov 25th, 2004 12:39 PM
Last post by Garrus
Today 12:09 PM
22 Replies, 10,743 Views
New Mini Cooper S 2014
Today 11:48 AM
by Garrus
Last post by Garrus
Today 11:48 AM
0 Replies, 33 Views
The Tyre Recommendation Thread
Apr 20th, 2008 01:26 PM
Last post by Garrus
Today 11:35 AM
214 Replies, 100,158 Views
Britax Duo Plus in R56 Cooper S Hatchback
Dec 15th, 2013 06:34 PM
by ican
Last post by Garrus
Today 11:34 AM
5 Replies, 1,520 Views
Leasing - My worksheet, I'm suspicious of dealer quote from Portland Mini
Sep 9th, 2014 06:32 PM
by hp79
Last post by Garrus
Today 11:30 AM
2 Replies, 483 Views
Tow Hitch for '13 Roadster
Feb 17th, 2014 05:56 AM
Last post by shokster
Today 10:39 AM
12 Replies, 1,502 Views
Mini Cooper S 2007 Disaster
Aug 20th, 2014 06:57 PM
Last post by MiniDeLux
Today 06:23 AM
4 Replies, 823 Views
» Premium
» Auto Insurance
Wheel & Tire Center

Powered by vBadvanced CMPS v3.2.1

All times are GMT. The time now is 01:52 PM.



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