E90Post
 


TNT Racewerks
 
BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > UK Technical Forum > Bedding in New Brakes - Advice



Reply
 
Thread Tools Search this Thread
      02-01-2010, 04:00 AM   #1
Hoops
Brigadier General
Hoops's Avatar
United Kingdom
286
Rep
3,658
Posts

Drives: E70 X5 xDrive35d M Sport
Join Date: May 2008
Location: Chigwell, Essex

iTrader: (5)

Garage List
Bedding in New Brakes - Advice

Just a quick one - have put some brand new OEM front discs and PF fast road pads all round on my car - and wanted to know what sort of bedding in process people recommend to ensure they work as efficiently as possible etc??

Slight issue ive had is that when they were fitted on Friday they discovered the front drivers side caliper was sticking - so i had to order a new/refurbed one. BUT that isnt being fitted until tomorrow morning - so ive been driving around with new brakes and a sticking caliper for last few days. Ive tried my best to not use it much and keep my speeds down (no comments about sat night please Carlos!!)

But just wanted some bedding in tips for tomorrow when i get new caliper on and brakes will be working properly.

Is it just a matter of doing some high speed heavy braking or is it more technical than that?? And is all this bedding in done to stop potential "squealing" happening???

Any advice appreciated.
__________________
E70 X5 xDrive35d M Sport - Carbon Black - Panoramic Roof - 21" BMW Alloys - BMW Performance Gloss Black Grilles - LCi Rear Light Upgrade - BMW 4.8i Exhaust Trims
Appreciate 0
      02-01-2010, 04:52 AM   #2
flyfs6
Captain
50
Rep
691
Posts

Drives: BMW i7
Join Date: Jun 2009
Location: London

iTrader: (0)

Lightbulb

Drive to a remote area. Use light to medium deceleration with varying starting speeds and perform at least 15 brake applications of 3-second duration. Leave at least 1/4 mile between each brake application.

The purpose of this procedure is to gradually increase the temperature in the components without inducing thermal shock, and to mate the brake pad and disc friction surfaces.

After the repeated stops, drive for several miles with little or no braking in order to adequately cool the components.

After the above process is completed, the system is ready for normal use .

The brakes should be smooth, with no vibrations, judder, etc.
Appreciate 0
      02-01-2010, 05:55 AM   #3
E92Fan
Moderator
E92Fan's Avatar
United Kingdom
334
Rep
5,493
Posts

Drives: .
Join Date: Aug 2007
Location: .

iTrader: (0)

Go out late at night when traffic is light and head to a dual carriageway (the A13 around Romford is excellent for this)

1) from 30mph, apply brakes firmly and smoothly to decelerate down to 10mph, come off the brakes and then..

2) accelerate gently to 40mph, then apply brakes firmly and smoothly down to 10mph again, off the brakes and accelerate gently to 50mph

3) apply brakes a bit harder this time and slow rapidly to 10mph, then accelerate to 60mph

4) do three sharp braking cycles from 60mph to 10mph, then drive without braking for a good five or six miles to let the pads and discs cool off


Your discs and pads will then be bedded in and all glazing removed. The pads will also be 'keyed' to the discs so any imperfection in the disc surface will be adapted to.
Appreciate 0
      02-01-2010, 05:57 AM   #4
themetz
smokin' kipper
themetz's Avatar
39
Rep
1,468
Posts

Drives: G60 i5 M60
Join Date: Feb 2009
Location: UK

iTrader: (2)

I think I've seen you doing this on Police, Camera, Action
Appreciate 0
      02-01-2010, 06:50 AM   #5
Neil McRae
BMW Motorsport
Neil McRae's Avatar
United Kingdom
243
Rep
2,227
Posts

Drives: BMW ///M4 F82 / BMW ///M5 F10
Join Date: Jan 2009
Location: Surrey

iTrader: (1)

Garage List
2020 BMW M5 CP  [0.00]
2015 BMW M4  [10.00]
Steve,
The key is not allow the pads and discs to get too hot whilst bedding them in. So no hard long presses on the brakes if you can avoid it.

Neil
__________________
--
Neil J. //McRae -- Alive and Kicking -- neil at DOMINO.ORG --///M ARMY
M5 CP Alpine White -- M2 LBB -- M4 DCT CP Alpine White
Appreciate 0
      02-01-2010, 07:50 AM   #6
Hoops
Brigadier General
Hoops's Avatar
United Kingdom
286
Rep
3,658
Posts

Drives: E70 X5 xDrive35d M Sport
Join Date: May 2008
Location: Chigwell, Essex

iTrader: (5)

Garage List
Thanks guys - perfect replies - will use this info tomorrow after the new caliper has been fitted - thanks again.
__________________
E70 X5 xDrive35d M Sport - Carbon Black - Panoramic Roof - 21" BMW Alloys - BMW Performance Gloss Black Grilles - LCi Rear Light Upgrade - BMW 4.8i Exhaust Trims
Appreciate 0
      02-01-2010, 07:52 AM   #7
willhollin
Major General
willhollin's Avatar
England
271
Rep
9,914
Posts

Drives: VW T5
Join Date: Apr 2008
Location: Worcestershire

iTrader: (1)

Garage List
Quote:
Originally Posted by STEVIEHOOPS View Post
Thanks guys - perfect replies - will use this info tomorrow after the new caliper has been fitted - thanks again.
Very similar to how I was bedding Carlos in at the weekend really.
__________________
Appreciate 0
      02-01-2010, 07:55 AM   #8
Hoops
Brigadier General
Hoops's Avatar
United Kingdom
286
Rep
3,658
Posts

Drives: E70 X5 xDrive35d M Sport
Join Date: May 2008
Location: Chigwell, Essex

iTrader: (5)

Garage List
Long, deep and hard - gotcha!
__________________
E70 X5 xDrive35d M Sport - Carbon Black - Panoramic Roof - 21" BMW Alloys - BMW Performance Gloss Black Grilles - LCi Rear Light Upgrade - BMW 4.8i Exhaust Trims
Appreciate 0
      02-01-2010, 07:58 AM   #9
creepy coupe
Lieutenant General
creepy coupe's Avatar
1825
Rep
13,043
Posts

Drives: BMW M340I G20
Join Date: Aug 2007
Location: UK

iTrader: (2)

Garage List
2015 BMW 435d  [0.00]
2009 335i  [0.00]
http://www.ebcbrakes.com/troubleshooting.shtml
Appreciate 0
Reply

Bookmarks


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



All times are GMT -5. The time now is 10:40 AM.




e90post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST