E90Post
 


Studio RSR
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Car feels unstable/unpredictable



Reply
 
Thread Tools Search this Thread
      10-03-2015, 07:05 PM   #1
Game
------
Game's Avatar
No_Country
7406
Rep
10,215
Posts

Drives: G87 M2 (sold)
Join Date: Aug 2010
Location: Chicago'ish

iTrader: (25)

Car feels unstable/unpredictable

As of a few days ago my car really started feeling unstable, almost as if I were driving on bald tires. I attributed it to dropping to 50 or so degrees and being on my summer tires (Hankook v12), however driving at 58 degrees it felt the same.

Today there was a slight drizzle and the car felt unsafe. I had to keep it under 40 mph. To best describe the feeling, it's almost as if I were driving during a strong windstorm. The feeling is even more noticeable when I hit small dips in the road.

Any ideas?

Tires have a ton of tread left. I can't imagine they'd have that much of an affect since it's not freezing out.

Could it possibly be worn control arm bushings? I'm at 100k miles and my mech mentioned I should replace them soon.
__________________
Appreciate 0
      10-03-2015, 08:15 PM   #2
Shoooter_j
Second Lieutenant
85
Rep
231
Posts

Drives: 07 e92 335
Join Date: May 2013
Location: Toronto

iTrader: (0)

Tire pressure? Try filling it up a few psi.
Appreciate 0
      10-03-2015, 08:36 PM   #3
Game
------
Game's Avatar
No_Country
7406
Rep
10,215
Posts

Drives: G87 M2 (sold)
Join Date: Aug 2010
Location: Chicago'ish

iTrader: (25)

Quote:
Originally Posted by Shoooter_j View Post
Tire pressure? Try filling it up a few psi.
Forgot to mention I did increase the tire pressure and no luck.
__________________
Appreciate 0
      10-03-2015, 10:49 PM   #4
feuer
Major General
feuer's Avatar
United_States
4276
Rep
9,206
Posts

Drives: wife crazy!
Join Date: Apr 2015
Location: Chicago, IL

iTrader: (5)

How old are you struts/shock and what brand?
Appreciate 0
      10-03-2015, 11:32 PM   #5
Game
------
Game's Avatar
No_Country
7406
Rep
10,215
Posts

Drives: G87 M2 (sold)
Join Date: Aug 2010
Location: Chicago'ish

iTrader: (25)

Quote:
Originally Posted by feuer
How old are you struts/shock and what brand?
KW V1 coil overs. Unsure of the mileage as I bought them used.
__________________
Appreciate 0
      10-04-2015, 05:05 AM   #6
Game
------
Game's Avatar
No_Country
7406
Rep
10,215
Posts

Drives: G87 M2 (sold)
Join Date: Aug 2010
Location: Chicago'ish

iTrader: (25)

Possible worn rear subframe bushings? Bad toe arms?
__________________
Appreciate 0
      10-04-2015, 07:34 PM   #7
Game
------
Game's Avatar
No_Country
7406
Rep
10,215
Posts

Drives: G87 M2 (sold)
Join Date: Aug 2010
Location: Chicago'ish

iTrader: (25)

Well, figured out the problem. The bolt holding the rear camber arm with the hub snapped. Now to get the rest out without stripping the threads.



__________________

Last edited by Game; 10-05-2015 at 01:42 AM..
Appreciate 0
      10-04-2015, 08:50 PM   #8
Shoooter_j
Second Lieutenant
85
Rep
231
Posts

Drives: 07 e92 335
Join Date: May 2013
Location: Toronto

iTrader: (0)

Scary stuff...great find and thx for the update!
Appreciate 1
      10-04-2015, 09:17 PM   #9
Game
------
Game's Avatar
No_Country
7406
Rep
10,215
Posts

Drives: G87 M2 (sold)
Join Date: Aug 2010
Location: Chicago'ish

iTrader: (25)

Quote:
Originally Posted by Shoooter_j View Post
Scary stuff...great find and thx for the update!
Not a problem. Always like to update my threads for future use.
__________________
Appreciate 0
      10-04-2015, 09:42 PM   #10
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 Game View Post
Well, figured out the problem. The bolt holding the rear control arm with the hub snapped. Now to get the rest out without stripping the threads.

Is that a toe arm? Yep she'd be squirrely....
Appreciate 0
      10-05-2015, 01:38 AM   #11
Game
------
Game's Avatar
No_Country
7406
Rep
10,215
Posts

Drives: G87 M2 (sold)
Join Date: Aug 2010
Location: Chicago'ish

iTrader: (25)

Quote:
Originally Posted by CALWATERBOY View Post
Is that a toe arm? Yep she'd be squirrely....
Nope that's the camber arm.
__________________
Appreciate 0
      10-05-2015, 10:44 AM   #12
feuer
Major General
feuer's Avatar
United_States
4276
Rep
9,206
Posts

Drives: wife crazy!
Join Date: Apr 2015
Location: Chicago, IL

iTrader: (5)

Quote:
Originally Posted by Game View Post
Well, figured out the problem. The bolt holding the rear camber arm with the hub snapped. Now to get the rest out without stripping the threads.
drill it with a tiny drill bit and hammer in a small torque bit in the hole and unbolt the broken off piece.
Appreciate 0
      10-05-2015, 10:54 AM   #13
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 Game View Post
Nope that's the camber arm.

Camber arm's the big one - here's mine - toe arm's in black:





Thatsa M3 Camber Arm. Yours will look somewhat diff if stock, but pretty much same size & shape.
Appreciate 0
      10-05-2015, 12:02 PM   #14
feuer
Major General
feuer's Avatar
United_States
4276
Rep
9,206
Posts

Drives: wife crazy!
Join Date: Apr 2015
Location: Chicago, IL

iTrader: (5)

Quote:
Originally Posted by CALWATERBOY View Post
Is that a toe arm? Yep she'd be squirrely....
Quote:
Originally Posted by Game View Post
Nope that's the camber arm.
correct, adjustable top camber arm.
Appreciate 0
      10-05-2015, 08:09 PM   #15
Game
------
Game's Avatar
No_Country
7406
Rep
10,215
Posts

Drives: G87 M2 (sold)
Join Date: Aug 2010
Location: Chicago'ish

iTrader: (25)

Well getting this broken bolt out has been a nightmare thus far.
__________________
Appreciate 0
      10-05-2015, 09:16 PM   #16
feuer
Major General
feuer's Avatar
United_States
4276
Rep
9,206
Posts

Drives: wife crazy!
Join Date: Apr 2015
Location: Chicago, IL

iTrader: (5)

Quote:
Originally Posted by Game View Post
Well getting this broken bolt out has been a nightmare thus far.
Are you working on it yourself? What tools and methods have you tried so far?
Appreciate 0
      10-05-2015, 09:53 PM   #17
Game
------
Game's Avatar
No_Country
7406
Rep
10,215
Posts

Drives: G87 M2 (sold)
Join Date: Aug 2010
Location: Chicago'ish

iTrader: (25)

Quote:
Originally Posted by feuer View Post
Are you working on it yourself? What tools and methods have you tried so far?
Working on it with a friend. Bought a screw/bolt extractor set that ended up snapping inside the original snapped bolt (we drilled a pilot hole inside the snapped bolt). So as of right now I'm going backwards.
__________________
Appreciate 0
      10-06-2015, 09:48 AM   #18
ajaye
Second Lieutenant
31
Rep
228
Posts

Drives: 07 328xi SGM
Join Date: Dec 2014
Location: Pittsburgh

iTrader: (0)

Quote:
Originally Posted by Game View Post
Working on it with a friend. Bought a screw/bolt extractor set that ended up snapping inside the original snapped bolt (we drilled a pilot hole inside the snapped bolt). So as of right now I'm going backwards.
Happens to the best of us.

Try what feuer said with a torx bit, I would probably try turning it by hand in that case.

I've also had luck cutting a deep thin notch/notches and using a flat or philips bit with an impact gun after a shitload of penetrating lube. The problem in your case though looks like you broke it flush with the hole so this may actually do more harm than good by allowing the bolt to expand/mushroom against the threads.

You could also try a local machine shop/welder. I've had one experience where a guy came to the house to help me out on his way home in the evening; if you get a nut welded on there to turn the time and aggravation it will probably end up saving is worth $30-$40 to me at least. It will take someone all of about 10 seconds.
Appreciate 1
      10-07-2015, 05:50 AM   #19
marconi118
Major
94
Rep
1,184
Posts

Drives: 06/07 e93 335i
Join Date: Nov 2008
Location: europe

iTrader: (0)

how did it snapped?

overtorquening?
Appreciate 0
      10-07-2015, 04:36 PM   #20
Game
------
Game's Avatar
No_Country
7406
Rep
10,215
Posts

Drives: G87 M2 (sold)
Join Date: Aug 2010
Location: Chicago'ish

iTrader: (25)

Quote:
Originally Posted by ajaye View Post
Happens to the best of us.

Try what feuer said with a torx bit, I would probably try turning it by hand in that case.

I've also had luck cutting a deep thin notch/notches and using a flat or philips bit with an impact gun after a shitload of penetrating lube. The problem in your case though looks like you broke it flush with the hole so this may actually do more harm than good by allowing the bolt to expand/mushroom against the threads.

You could also try a local machine shop/welder. I've had one experience where a guy came to the house to help me out on his way home in the evening; if you get a nut welded on there to turn the time and aggravation it will probably end up saving is worth $30-$40 to me at least. It will take someone all of about 10 seconds.
At this point it's almost beyond repairing. My extraction screw snapped inside of the broken bolt and it's near impossible to drill through the extraction screw.

Quote:
Originally Posted by marconi118 View Post
how did it snapped?

overtorquening?
I wish I knew.
__________________
Appreciate 0
      10-07-2015, 06:05 PM   #21
feuer
Major General
feuer's Avatar
United_States
4276
Rep
9,206
Posts

Drives: wife crazy!
Join Date: Apr 2015
Location: Chicago, IL

iTrader: (5)

Quote:
Originally Posted by Game View Post
At this point it's almost beyond repairing. My extraction screw snapped inside of the broken bolt and it's near impossible to drill through the extraction screw.
I wish I knew.
Drive it to Chicago! It will be done at the shop.
Appreciate 1
      10-07-2015, 07:06 PM   #22
ajaye
Second Lieutenant
31
Rep
228
Posts

Drives: 07 328xi SGM
Join Date: Dec 2014
Location: Pittsburgh

iTrader: (0)

Quote:
Originally Posted by Game View Post
At this point it's almost beyond repairing. My extraction screw snapped inside of the broken bolt and it's near impossible to drill through the extraction screw.



I wish I knew.
LOL I've been there man. I would seriously try to get a welder to come by, even if its broken below the surface of the hole you can weld some smaller washers to the broken bolt then a nut to the washers when they are high enough to clear. I've kicked myself more than once for fighting with stuff like this for too long. I doubt it would be more than the tow to a shop will cost you if you paid out of pocket.
Appreciate 1
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 04:26 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