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 > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing
 
Post Reply
 
Thread Tools Search this Thread
      08-04-2013, 04:08 PM   #1
schristm
Registered
0
Rep
4
Posts

 
Drives: 2009 BMW M3 E93
Join Date: Aug 2013
Location: Knoxville, TN

iTrader: (0)

Question Front end alignment results mixed

Hello,

I just got my car back from the dealership where they did a front-end alignment on my e93 M3.

A couple of weeks ago I hit a pothole on the highway and bent my front driver-side wheel beyond repair, as well as the driver rear wheel to a lesser extent. Upon investigation, the dealership determined that all four wheels were "out of balance" and one wheel was repaired, and the one worst off was replaced entirely.

I'm not sure how all four of my wheels would've been out of balance since the vehicle just got four brand new tires (Super Sports) from a very reputable tire shop here in town less than a year ago. But, I went along with what they said.

Finally, they did a front-end alignment after determining that the vehicle still had a slight vibration. Long story short, I got the car back and I don't feel like it corners like it used to. The suspension feels "looser" and I even lost a little front end traction following a corner (albeit fast and obnoxious, but not any worse than I usually take that turn). On the other hand, the ride feels more comfortable and less stiff.

I have the EDC, and the settings for it have remained unchanged. Is it possible that the front-end alignment took some of the "sport" out of my suspension, making the ride more comfortable, but less tight? I really can't tell if this is all in my head or not, but the car just doesn't drive the same. I haven't decided yet if this a good or a bad thing, though.

Any help is much appreciated.
Appreciate 0
      08-06-2013, 03:03 PM   #2
signes
Brigadier General
signes's Avatar
United_States
63
Rep
4,213
Posts

 
Drives: E90 M3
Join Date: Sep 2008
Location: Spinnin at 8k

iTrader: (3)

Post a scan (or post the numbers) from your alignment sheet. The dealer should have given you one that shows before and after alignment values.
__________________
08 E90 | Jet Black / Black | 6MT
Mods: RAC RG63 w/ Pirelli Corsa 255F/285R | Akrapovic Evo Exhaust | OEM Blacklines
Winter Setup: OEM 18s w/ Nokian Hakkapeliita R 245/40-18
Appreciate 0
      08-08-2013, 06:09 PM   #3
schristm
Registered
0
Rep
4
Posts

 
Drives: 2009 BMW M3 E93
Join Date: Aug 2013
Location: Knoxville, TN

iTrader: (0)

The before and after numbers are attached.
Attached Images
File Type: pdf alignment.pdf (616.3 KB, 97 views)
Appreciate 0
      08-13-2013, 02:35 PM   #4
kenwelch
Lieutenant
United_States
4
Rep
407
Posts

 
Drives: 2008 E92 M3 M-DCT
Join Date: Dec 2006
Location: Mission Viejo, CA

iTrader: (0)

Quote:
Originally Posted by schristm View Post
The before and after numbers are attached.
It looks like the BMW alignment technician did not complete the Caster measurement in the before or after alignment printout. So the tech and you do not know if the caster is correct. This is an important “flat-rate” short cut that shouldn’t have been done for the likely price charged. Notice that your print-out does not show a caster measurement.

To help you understand how the caster measurement is completed and some additional alignment training I have provided links below. This may be much more than you wanted to know, but I teach automotive repair and have used Hunter equipment in the lab. Many of the BMW dealers use Hunter Engineering equipment and I have been lucky enough to have their equipment during most of the 40 years that I have been teaching.

This is a link to the alignment video library:
(If you get excited to learn more about alignment)
http://www.hunter.com/videos/index.cfm?cat=2

Important- watch this video below
Watch this video to see how fast it is to check alignment with modern equipment. At 1:32 in the video you will notice that the technician turns the steering wheel left and right to measure caster. This is required for the equipment to do the calculation and provide the results on the printout. Remember this video shows the “90 second check” and does not show the technician completing the adjustments required for correction.
http://www.hunter.com/videos/index2.cfm?v=148&cat=2

In this video at 4:00 you will see what a complete alignment measurement print-out should look like and the caster measurement showing.
http://www.hunter.com/videos/index2.cfm?v=132&cat=2

Your car needed rear wheel alignment adjustments. The rear alignment changes will make the car feel different. Wheel alignment will not correct vibration. They might have re-balanced the tires to correct the problem not solved the first time, maybe he did the “flat-rate” on the tire balance also.
Appreciate 0
      08-17-2013, 12:53 AM   #5
schristm
Registered
0
Rep
4
Posts

 
Drives: 2009 BMW M3 E93
Join Date: Aug 2013
Location: Knoxville, TN

iTrader: (0)

Thank you very much for the reply. I will watch the videos you posted, but I'm a little confused as to what I should aim to communicate to the dealership. More, specifically, can you help me put into words what I should request from them?
Appreciate 0
      08-17-2013, 01:33 PM   #6
kenwelch
Lieutenant
United_States
4
Rep
407
Posts

 
Drives: 2008 E92 M3 M-DCT
Join Date: Dec 2006
Location: Mission Viejo, CA

iTrader: (0)

Quote:
Originally Posted by schristm View Post
Thank you very much for the reply. I will watch the videos you posted, but I'm a little confused as to what I should aim to communicate to the dealership. More, specifically, can you help me put into words what I should request from them?

The technician did not complete the alignment checks based on the printout. He skipped the Caster measurement, now both of us do not know if the Caster is correct or not. I paid for a complete alignment that was not done.

Describe how the car now feels when driving and ask if they will complete the alignment that you paid for. You brought the vehicle in because of the pot hole damage that bent the wheels. As part of the diagnosis the Caster measurement would be helpful, because the vehicle still does not feel correct.
Appreciate 0
      08-23-2013, 02:04 PM   #7
meez
Sloppy Seconds Connoisseur
meez's Avatar
9
Rep
553
Posts

 
Drives: 2011 DY E90 M3
Join Date: Mar 2011
Location: SoCal

iTrader: (5)

Quote:
Originally Posted by kenwelch View Post
The technician did not complete the alignment checks based on the printout. He skipped the Caster measurement, now both of us do not know if the Caster is correct or not. I paid for a complete alignment that was not done.

Describe how the car now feels when driving and ask if they will complete the alignment that you paid for. You brought the vehicle in because of the pot hole damage that bent the wheels. As part of the diagnosis the Caster measurement would be helpful, because the vehicle still does not feel correct.
You are the shit, kind sir.

Kudos for your knowledge and helping the community.
Appreciate 0
      09-07-2013, 10:04 AM   #8
pkimM3r
Banned
pkimM3r's Avatar
95
Rep
7,321
Posts

 
Drives: m3 saloon in granny mode.
Join Date: Dec 2009
Location: lost angeles

iTrader: (0)

Can you also ask for the tech to make sure the toe in settings are at the factory minimal allowed in the front and back.
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
Forum Jump


All times are GMT -5. The time now is 10:56 AM.




m3post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, 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