BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Track / Autocross / Dragstrip / Driving Techniques
 
Steve Thomas BMW
Post Reply
 
Thread Tools Search this Thread
      06-18-2018, 04:31 PM   #1
MPower7
Second Lieutenant
MPower7's Avatar
54
Rep
220
Posts

Drives: 11' e92 M3
Join Date: Apr 2008
Location: SF

iTrader: (1)

Break Bleed Clairification

Hello,

I've changed the brake pads enough times to know that process. Here is my question.

I don't know if I will be able to have all 4 wheels off of the car at the same time.

What is the correct order of changing the pads and the fluid. Is it all 4 pads first then flush the fluid? Can I do one corner at a time, back passenger pads and fluid then move on the the other three sides?

When I am changing the pads I know you have to start the car and pump the pedal a few times, is it necessary to achieve pressure before flushing the fluid?

Also, I am using Castrol SRF fluid so I would prefer to drain the reservoir on the car then add new fluid and just use the bleeder as a pressure on the reservoir and not actually fill the bleeder reservoir.

Thanks,
Appreciate 0
      06-18-2018, 05:14 PM   #2
msan
Captain
267
Rep
924
Posts

Drives: 2011 E90 M3 / 2012 X5 35i M Sp
Join Date: May 2015
Location: Los Angeles, CA

iTrader: (15)

I'm no expert but I'd say you should change all your pads first. Then start the brake bleed process starting with the rear passenger corner. If you try and change pad and bleed the same corner I'd be afraid when you press the calipers in to fit the new pads at the next corner it might push old fluid into the corner you just bled.

Someone else can opine of that logic .
Appreciate 0
      06-18-2018, 05:42 PM   #3
roastbeef
Major General
roastbeef's Avatar
United_States
3862
Rep
8,080
Posts

Drives: E92 M3
Join Date: Nov 2010
Location: Orange County, CA

iTrader: (1)

Change the pads first. I can see dealing with bleeding while trying to push out the pistons from a pad change being vague and frustrating. I'd imagine you'd have to push more fluid than necessary as well.
__________________
Appreciate 0
      06-18-2018, 06:05 PM   #4
dbyrd
DSC Off!
dbyrd's Avatar
121
Rep
527
Posts

Drives: 2012 E92 M3 6MT ZCP
Join Date: May 2010
Location: Dallas

iTrader: (0)

It doesn't matter the order of pads but it does for bleeding so changed pads and bleed each corner at the same time starting with rear passenger, rear driver, front passenger, then front driver's side. Farthest from master cylinder to nearest. If this is first change, baste out as much as possible first, then fill with new before starting. ...and it's brake.
__________________
MCS 1WNR with 600/900 spring rates / Vorshlag camber plates / Apex ARC-8s with Apex studs / Hoosiers, NT-01s, RE-71Rs, Pirelli DHs, Conti slicks / Stoptech Trophy ST-60/ST-40 / Cantrell Motorsports Brake Duct Kit / Cobalt Friction XR1, XR2s or PFC pads / UUC Corsa axle-back with Fabspeed HFC and x-pipe / Schroth Quick Fit Pros / HANS Sport II / AA green filter / Coolshirt with large bag / Aim SoloDL with SmartyCam / CSF Radiator (not needed on current car - selling this so PM me)
Appreciate 0
      06-18-2018, 07:11 PM   #5
MPower7
Second Lieutenant
MPower7's Avatar
54
Rep
220
Posts

Drives: 11' e92 M3
Join Date: Apr 2008
Location: SF

iTrader: (1)

Both pads are worn the same so I will not need to push the caliper in. I was thinking about pushing the rear passenger cylinder all the way in the push as much fluid into the reservoir as possible and then drain it. Although it may not be necessary. I do not have access to a lift, and may not be able to get the rear of the car on jackstands, I don't want to jack up a corner change pads, then put the wheel back on just to have to take it off again to bleed it.

Wow what a noob, I know it is Brake. Bonus pic from Laguna on Sat.

Appreciate 1
roastbeef3861.50

      06-18-2018, 07:45 PM   #6
msan
Captain
267
Rep
924
Posts

Drives: 2011 E90 M3 / 2012 X5 35i M Sp
Join Date: May 2015
Location: Los Angeles, CA

iTrader: (15)

Quote:
Originally Posted by MPower7 View Post
Both pads are worn the same so I will not need to push the caliper in.
If your pads are worn, you will need to push the caliper in even more when changing to new pads....
Appreciate 0
      06-18-2018, 07:48 PM   #7
MPower7
Second Lieutenant
MPower7's Avatar
54
Rep
220
Posts

Drives: 11' e92 M3
Join Date: Apr 2008
Location: SF

iTrader: (1)

Quote:
Originally Posted by msan View Post
If your pads are worn, you will need to push the caliper in even more when changing to new pads....
I'm switching between my PFC08 and OEM pads. I swap them after track days. Right now they have the same MM left on them. Both are used.
Appreciate 0
      06-21-2018, 03:32 PM   #8
MPower7
Second Lieutenant
MPower7's Avatar
54
Rep
220
Posts

Drives: 11' e92 M3
Join Date: Apr 2008
Location: SF

iTrader: (1)

My plan is to buy 4 jack stands, some wood blocks and another jack. Drive the car up on blocks and see if I can get the jack to the Diff and front jack point. Wish me luck.
Appreciate 0
      06-21-2018, 04:33 PM   #9
macdude357
Captain
macdude357's Avatar
299
Rep
600
Posts

Drives: IB E90 M3
Join Date: Sep 2015
Location: San Diego

iTrader: (5)

Quote:
Originally Posted by MPower7 View Post
My plan is to buy 4 jack stands, some wood blocks and another jack. Drive the car up on blocks and see if I can get the jack to the Diff and front jack point. Wish me luck.
I use the RaceRamps Trak Jax for that very purpose. I tried using wood blocks but they kept slipping. The Trak Jax are just tall enough (3") for me to fit my jack under the front bumper.
Appreciate 1
DreamTime461.50

      06-28-2018, 10:35 PM   #10
bigjae1976
Major General
bigjae1976's Avatar
526
Rep
6,969
Posts

Drives: 11 E90 M3 Individual
Join Date: Mar 2006
Location: Wichita, KS

iTrader: (15)

Garage List
2004 BMW M3  [4.50]
2011 BMW E90 M3  [5.00]
2013 BMW 328i  [5.00]
It's pads first. When you're done, the fluid should be a max level with full pads. So you'll never have to worry about the brake reservoir on the master cylinder overflowing and ruining that sensor that's right below it.
__________________
2015 F34 328iX GT Glacier Silver
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red
Appreciate 1
MPower753.50

      06-29-2018, 12:55 AM   #11
ayao
Thread killer
335
Rep
1,604
Posts

Drives: 1M
Join Date: Aug 2011
Location: CA

iTrader: (2)

Quote:
Originally Posted by bigjae1976 View Post
It's pads first. When you're done, the fluid should be a max level with full pads. So you'll never have to worry about the brake reservoir on the master cylinder overflowing and ruining that sensor that's right below it.
Exactly this.
Appreciate 0
      06-29-2018, 05:46 PM   #12
vincE92M3
Major
vincE92M3's Avatar
United_States
485
Rep
1,365
Posts

Drives: ///M
Join Date: Nov 2012
Location: Atlanta, GA

iTrader: (3)

Garage List
'11 E92 M3  [0.00]
Quote:
Originally Posted by MPower7 View Post
My plan is to buy 4 jack stands, some wood blocks and another jack. Drive the car up on blocks and see if I can get the jack to the Diff and front jack point. Wish me luck.
Highly recommend ESCO jack stands for ultimate safety.
__________________
Appreciate 0
      06-29-2018, 06:08 PM   #13
MPower7
Second Lieutenant
MPower7's Avatar
54
Rep
220
Posts

Drives: 11' e92 M3
Join Date: Apr 2008
Location: SF

iTrader: (1)

Update: Success, job went well. Just bought some 2.5 inch ramps drove the car up. Jacked from Diff and front center point with a wood block for extra clearance. Put the car on standard jackstands which did not deform the jack points at all.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 -4. The time now is 10:48 AM.




m3post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
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