E90Post
 


Coby Wheel
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Uneven coilovers, help!



Reply
 
Thread Tools Search this Thread
      06-08-2012, 12:10 PM   #1
Mr Singh
Banned
United Kingdom
63
Rep
773
Posts

Drives: E91 330D M Sport Auto
Join Date: Oct 2011
Location: Milton Keynes

iTrader: (3)

Exclamation Uneven coilovers, help!

fffff

Last edited by Mr Singh; 07-04-2012 at 12:41 PM..
Appreciate 0
      06-08-2012, 01:04 PM   #2
mike-y
just another bmw douche bag
United_States
195
Rep
3,640
Posts

Drives: 1.9L of fury
Join Date: Nov 2008
Location: Los Angeles, CA

iTrader: (4)

is that driveway completely level? if you drive to another location and stop, does the car still look level?

also, check the front struts - are they adjusted exactly the same on both sides? making changes to one corner will often affect the opposite one, so it can be tricky trying to get the car level.
Appreciate 0
      06-08-2012, 03:57 PM   #3
BRGmatthew
Bausman
BRGmatthew's Avatar
United_States
63
Rep
1,817
Posts

Drives: around the block
Join Date: Sep 2009
Location: SoCal 626/NorCal 650

iTrader: (19)

I have the same problem. Its a bmw thing. Lol. I maxed out my drop by completely taking off the perches and just left it like that
Appreciate 0
      06-08-2012, 04:23 PM   #4
CALWATERBOY
Major
CALWATERBOY's Avatar
146
Rep
1,160
Posts

Drives: 2009 E93 N54
Join Date: Jan 2011
Location: San Francisco

iTrader: (0)

Quote:
Originally Posted by Mr Singh View Post
Yep its been checked on a perfectly flat shop floor.
[1] What did you use to verify the floor's level, all 4 tire contacts? Nearly all floors are not, varying from location to location across the floor.

[2] What ride height are you targeting?

[3] How are you measuring ride height?

Name:  Puzzled [1].jpg
Views: 1713
Size:  7.2 KB

Last edited by CALWATERBOY; 06-08-2012 at 04:31 PM..
Appreciate 0
      06-09-2012, 08:56 AM   #5
The HACK
Midlife Crises Racing Silent but Deadly Class
The HACK's Avatar
1821
Rep
5,337
Posts

Drives: 2006 MZ4C, 2021 Tesla Model 3
Join Date: Oct 2007
Location: Welcome to Jamaica have a nice day

iTrader: (1)

Every single BMW I have ever owned, that includes:

1x E30 318is, 1x Z3 1.9l, 2x E46 323Ci, 1x E85 Z4, 1x E60 545i, 1x E86 MZ4 Coupe, and 1x E92 328i...

Has had the passenger side sit around 1/4" lower than the driver side when no one is in the car. Since new.

Every single one.
__________________
Sitting on a beat-up office chair in front of a 5 year old computer in a basement floor, sipping on stale coffee watching a bunch of meaningless numbers scrolling aimlessly on a dimly lit 19” monitor.
Appreciate 0
      06-09-2012, 12:54 PM   #6
CALWATERBOY
Major
CALWATERBOY's Avatar
146
Rep
1,160
Posts

Drives: 2009 E93 N54
Join Date: Jan 2011
Location: San Francisco

iTrader: (0)

Quote:
Originally Posted by Mr Singh View Post
So if its a BMW thing.. everyone has bent suspension?
Ride height varies front / rear; if you measure to the floor you include the tire, not a reliable value. For my ride:

Ride height is measured from the top of the wheel well fender flange to the bottom of the wheel rim.

Front Stock Values:

16" wheel -- 22.99 in -- 584 mm
17" wheel -- 23.58 in -- 599 mm
18" wheel -- 24.09 in -- 612 mm
19" wheel -- 24.60 in -- 625 mm

Rear Stock Values:

16" wheel -- 22.24 in -- 565 mm
17" wheel -- 22.83 in -- 580 mm
18" wheel -- 23.35 in -- 593 mm
19" wheel -- 23.82 in -- 605 mm

But if you wish to work with wheels off the car, which I did, measure from the top of the wheel well fender flange to the bottom of the hub. That was 18.7" front; 18" rear on my car.


__________________


Nope, you shouldn't trust that a shop floor's level. Verify with a water level - can easily be 1/2" diff, just within the footprint of an E9x. Here's something made for Joe Lunchbucket, but valid for everyone:



Move to 2:07 into the video. 1/2" is enough to create significant alignment error.

Name:  Think 04.gif
Views: 1470
Size:  4.9 KB

Last edited by CALWATERBOY; 06-09-2012 at 05:24 PM..
Appreciate 0
      06-09-2012, 05:08 PM   #7
CALWATERBOY
Major
CALWATERBOY's Avatar
146
Rep
1,160
Posts

Drives: 2009 E93 N54
Join Date: Jan 2011
Location: San Francisco

iTrader: (0)

Quote:
Originally Posted by Mr Singh View Post
Thanks for you input, but trust me the floor is flat
We'll have to disagree on that - even if level when installed, not a given, it'll change.

Good pics & clean shop. There's this guy, Murphy....

.

Last edited by CALWATERBOY; 06-09-2012 at 05:38 PM..
Appreciate 0
      06-09-2012, 07:37 PM   #8
CALWATERBOY
Major
CALWATERBOY's Avatar
146
Rep
1,160
Posts

Drives: 2009 E93 N54
Join Date: Jan 2011
Location: San Francisco

iTrader: (0)

Quote:
Originally Posted by Mr Singh View Post
This is on the rear only, front is not an issue. The rear passanger side is on the lowest setting. The driver side has around 7 turns left. At this point the rear sits level.
Curiosity got me....

Have you taken springs & hats off to compare?
Appreciate 0
      06-10-2012, 06:26 AM   #9
cdgatti
Colonel
cdgatti's Avatar
255
Rep
2,547
Posts

Drives: e90 328i
Join Date: May 2011
Location: KY

iTrader: (4)

Are the dampers high pressure gas? If one is considerable highe pressure than the other, that can cause a height difference. Along the lines of people saying that when they install Bilstein HD shocks, but use their stock springs their ride height increases.
Appreciate 0
      06-10-2012, 07:32 AM   #10
DriftDreamzSS
Captain
DriftDreamzSS's Avatar
22
Rep
627
Posts

Drives: e92 335i
Join Date: Aug 2009
Location: Oxnard, Ca / Lafayette, LA

iTrader: (2)

How many miles are on them, you sure it doesn't need a rebuild?
__________________
_
Appreciate 0
      06-10-2012, 01:05 PM   #11
BRGmatthew
Bausman
BRGmatthew's Avatar
United_States
63
Rep
1,817
Posts

Drives: around the block
Join Date: Sep 2009
Location: SoCal 626/NorCal 650

iTrader: (19)

maybe your bumpstops are uneven?
Appreciate 0
      06-10-2012, 02:52 PM   #12
CALWATERBOY
Major
CALWATERBOY's Avatar
146
Rep
1,160
Posts

Drives: 2009 E93 N54
Join Date: Jan 2011
Location: San Francisco

iTrader: (0)

Quote:
Originally Posted by Mr Singh View Post
You seriously are not helping I told you the floor is flat. If the floor was out by 2mm it would not make up for almost 1" in ride height difference in the rear SIDE TO SIDE So quit blaming it on my method of measuring.
Take it as you like - saying you have the accuracy of uncalibrated equipment and technique.

What else could be wrong? Bent subframe I suppose. Bent camber arm, guide arm, control arm, and/or sway bar.

Much more likely: Toasted bushing(s) among preceding.

Distance from shock hat to camber arm, both sides, match?

Maybe goes without saying -- suspension bolt torques.
Appreciate 0
      06-10-2012, 06:20 PM   #13
serotoninsteve
Private First Class
7
Rep
131
Posts

Drives: 335i
Join Date: Apr 2011
Location: Luxemburg

iTrader: (0)

Quote:
Originally Posted by Mr Singh View Post
YES. They are same lengths. We even swapped over springs. SAME issue.
Hello,

does this mean the problem stays on the same side even after swapping the springs?
Then the springs are out of the equation.

You wrote the suspension has 2000miles, did you buy them second hand?
I ask this because the rubbing marks on the shock look rather as if this one has a lot more miles on them.

Did you try to swap the shocks too?

Did you loosen all the suspension bolts and retighten at driving height?
Because this can cause additional spring rates from the stressed bushings.

You wrote that you reused the oem bumpstops,
I'm not shure how the Weitecs come from factory,
but my KW V3s came with their own shorter bumpstops and Weitec is owned by KW.
The Weitecs should be similar to V1s only not made from stainless steel.

From the pics I see your car already is very low,
there is not much travel left, if any with the oem bumpstops.
Usually they are meant to act ass additional spring,
perhaps they are worn on one side? It is not always visible If they are worn. How many miles does the car have?

If there is really nothing wrong with all the parts,
you should corner balance the whole setup and live with it.
Perhaps then the spring adjusters sit level, only the look is off afterwards.

But I doubt that the tolerances are that high from BMW, especially from left to right.
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 05:30 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