E90Post
 


 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > All-Wheel-Drive (Xi / xDrive) Talk > Suspension problem



Reply
 
Thread Tools Search this Thread
      06-04-2024, 11:11 AM   #1
warlockuy
Private First Class
32
Rep
108
Posts

Drives: 320i n46 :(
Join Date: Jun 2023
Location: Mvd

iTrader: (0)

Garage List
Suspension problem

Hello
I'm new to XDrive.
I would like to know if you can help me with the suspension issue, I anticipate that I saw and read many threads on the forum.
But I couldn't draw the conclusion.
The car has all the suspension according to the official service in perfect condition.
But the car doesn't feel safe if you drive fast or turn in a hurry, it seems as if you were on a cloud, it moves laterally, it doesn't move from the ground, I never had the feeling that the car wanted to go backwards or forwards.
But if, as unsafe, unstable, you feel that the car is moving sideways.
What is this really?
Soft shock absorbers? I never hit the top of the suspension.
It is as if the wheels remain on the ground but above the chassis moves laterally.
Is it solved by changing the shock absorbers? about blistein B14 pss or koni yellow?
Or is it other things that need to be changed? or reinforce?
I would appreciate it if you could guide me where to start so I buy the right things.
I don't want a track car, but a safe car that can be driven fast at times, and feels safe.
Before this I had a RWD and it felt much safer.
At this moment the car is 100% original wheels 16 205 55
Thank you
Appreciate 0
      06-05-2024, 11:43 AM   #2
Brian86
Captain
Brian86's Avatar
662
Rep
786
Posts

Drives: e36 M3, e91 325xi, N50 Xterra
Join Date: Dec 2020
Location: Pittsburgh

iTrader: (0)

The 4wd should feel almost exactly the same as a 2wd car except for some subtle differences. A little more understeer on corner entry and less rear axle steering on corner exit for instance. But this isn't something one will notice except when driving 8/10s or more.

Assuming the suspension is all 'in good condition' according to a mechanic...

Check out the front strut-rod bushings. When they wear out it is not obvious when wiggling the tires on a lift because they are rubber, but will cause weird toe changes under braking, acceleration, and other loading.

Is it possible that your rear subframe is moving around on the bushings? Another thing that is not found by 'wiggling the tires' However the subframe bushings are very robust. Is it possible the steering rack is loose in the front subframe?

Try getting under the car with a pry bar and see if anything is moving relative to the body.

There are many things that could cause it but I'm making suggestions based on what a 'normal shop' might fail to diagnosis during an inspection.
__________________
Sometimes a bolt is just a bolt.
Appreciate 0
      06-05-2024, 12:30 PM   #3
warlockuy
Private First Class
32
Rep
108
Posts

Drives: 320i n46 :(
Join Date: Jun 2023
Location: Mvd

iTrader: (0)

Garage List
Quote:
Originally Posted by Brian86 View Post
The 4wd should feel almost exactly the same as a 2wd car except for some subtle differences. A little more understeer on corner entry and less rear axle steering on corner exit for instance. But this isn't something one will notice except when driving 8/10s or more.

Assuming the suspension is all 'in good condition' according to a mechanic...

Check out the front strut-rod bushings. When they wear out it is not obvious when wiggling the tires on a lift because they are rubber, but will cause weird toe changes under braking, acceleration, and other loading.

Is it possible that your rear subframe is moving around on the bushings? Another thing that is not found by 'wiggling the tires' However the subframe bushings are very robust. Is it possible the steering rack is loose in the front subframe?

Try getting under the car with a pry bar and see if anything is moving relative to the body.

There are many things that could cause it but I'm making suggestions based on what a 'normal shop' might fail to diagnosis during an inspection.
very thanks
I'm going to have it tested by a mechanic from the official service, but if it is a feeling of something strange, this does not happen if you are calm, but when one's head skids haha ​​and accelerates it did not feel safe at all

thanks
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 03:11 PM.




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