E90Post
 


VIBE Motorsports
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > * 07' 328i Coupe: Bumpy, Rough Ride. HEEEELP *



Reply
 
Thread Tools Search this Thread
      11-18-2011, 09:40 AM   #1
SaMirakle
Private
4

 
SaMirakle's Avatar
 
Drives: 07' 328i Coupe
Join Date: Jan 2011
Location: Dallas


Posts: 57
iTrader: (2)

Exclamation * 07' 328i Coupe: Bumpy, Rough Ride. HEEEELP *

Hey everyone, hopefully someone with more knowledge than my stupid ass dealership can help me out on this:

For a while my e92's been riding pretty rough and bumpy..swaying a little bit. I mean even on the highway it sucks. I know this isn't normal because my best friend has a 335i with the sport suspension like mine and his rides WAY smoother. He even complains about how bumpy my car rides when we take mine.

Anyway, so I took it up to the dealer 2 days ago and my service advisor leaves me a voicemail yesterday saying that the suspension seems fine but that my 2 front tires need to be replaced and it needs an alignment???

First of all, my tire pressure is fine and I honestly don't think "bad" tires can cause my car to be THAT rough of a ride. I frequently get lifted out of my seat a little bit (not too much) and my head bobs up and down a lot especially on shitty roads. Second of all, I got my alignment done a YEAR ago when I bought my car at that same dealership and my car doesn't have a significant pull to either side..


Can anyone shine some insight on me or am I just stupid and my tires and alignment are my problems???? THANKS!
Appreciate 0
      11-18-2011, 10:16 AM   #2
sle39lvr
Lieutenant
40

 
Drives: 08 328i
Join Date: Aug 2011
Location: United States


Posts: 542
iTrader: (3)

what size wheels and what kind of tires you have?
Appreciate 0
      11-18-2011, 10:45 AM   #3
SaMirakle
Private
4

 
SaMirakle's Avatar
 
Drives: 07' 328i Coupe
Join Date: Jan 2011
Location: Dallas


Posts: 57
iTrader: (2)

Not sure off the top of my head. It's still at the dealership right now. Gonna pick it up after work. I just know my rims are 18". Tires are low pros and not sure the exact size...

What difference would it make though? They're low pro's which means there isn't much space to make the car bounce the way it does... I'd understand if they were thicker but even then it's probably be a smoother ride than low pro's.
Appreciate 0
      11-18-2011, 12:19 PM   #4
luckyu
Lieutenant
14

 
luckyu's Avatar
 
Drives: 2007 328i, 1998 328i
Join Date: Jan 2007
Location: San Francisco Bay Area, California


Posts: 423
iTrader: (1)

Quote:
Originally Posted by SaMirakle View Post
Hey everyone, hopefully someone with more knowledge than my stupid ass dealership can help me out on this:

For a while my e92's been riding pretty rough and bumpy..swaying a little bit. I mean even on the highway it sucks. I know this isn't normal because my best friend has a 335i with the sport suspension like mine and his rides WAY smoother. He even complains about how bumpy my car rides when we take mine.

Anyway, so I took it up to the dealer 2 days ago and my service advisor leaves me a voicemail yesterday saying that the suspension seems fine but that my 2 front tires need to be replaced and it needs an alignment???

First of all, my tire pressure is fine and I honestly don't think "bad" tires can cause my car to be THAT rough of a ride. I frequently get lifted out of my seat a little bit (not too much) and my head bobs up and down a lot especially on shitty roads. Second of all, I got my alignment done a YEAR ago when I bought my car at that same dealership and my car doesn't have a significant pull to either side..


Can anyone shine some insight on me or am I just stupid and my tires and alignment are my problems???? THANKS!
From your description of swaying and getting lifted out of your seat, it sounds really similar to what I had, which I'm pretty sure was due to riding on bump stops. This means, there is so little space between shock and bump stop, that you're hitting it all the time, and in large bumps you compress the bump stop considerably, and then the bump stop launches the car back.

All of this body movement overcomes the shocks, and so you experience floating, bouncy body movement.

If that sounds like what you have, there are different OE bump stops that may help a great deal. For how long was your suspension OK, and when do you think it started behaving bad? Have you noticed / measured a change in ride height?

I would steer clear of dealers if I were you. Find an honest shop.
__________________
2007 328i ZSP. M3 suspension: custom valved Bilstein shocks, Hyperco race springs, M3 lower control arms front and rear, M3 sway bars, and M3 subframe bushings. E46 front guide supports. Euro tail lights.
Appreciate 0
      11-18-2011, 03:50 PM   #5
SaMirakle
Private
4

 
SaMirakle's Avatar
 
Drives: 07' 328i Coupe
Join Date: Jan 2011
Location: Dallas


Posts: 57
iTrader: (2)

Hmm yeah that sounds like what I'm experiencing here... The dealership is pretty stubborn and they're not going to take any of the shit I plan on giving them for it. I'm pretty sure it's not my tires or the alignment... That sounds very ridiculous.

Anyway, I've had the car for a year now and when I first got it it wasn't noticeable but it was probably not as smooth as it could've been. I just figured it was supposed to be that way because of the tighter sport package suspension. As the year went on it's gotten noticeably worse and for the past 4-5 months it's been VERY ANNOYING.

I guess there's no use in arguing with the dealer about it. I'll just have to take a loss on the diagnostic fee they're charging me and try some suspension shops to get their opinions.
Appreciate 0
      11-18-2011, 05:02 PM   #6
luckyu
Lieutenant
14

 
luckyu's Avatar
 
Drives: 2007 328i, 1998 328i
Join Date: Jan 2007
Location: San Francisco Bay Area, California


Posts: 423
iTrader: (1)

Quote:
Originally Posted by SaMirakle View Post
Hmm yeah that sounds like what I'm experiencing here... The dealership is pretty stubborn and they're not going to take any of the shit I plan on giving them for it. I'm pretty sure it's not my tires or the alignment... That sounds very ridiculous.
Yes, it is ridiculous. That's exactly what it is.

Quote:
Anyway, I've had the car for a year now and when I first got it it wasn't noticeable but it was probably not as smooth as it could've been. I just figured it was supposed to be that way because of the tighter sport package suspension. As the year went on it's gotten noticeably worse and for the past 4-5 months it's been VERY ANNOYING.
I think what's happening is that you are now very close to riding on your bump stops, and the reason the symptoms have come on gradually is that your springs are sagging slightly over time, or, something else in your suspension is "settling" causing your ride height to lower slightly. Loss of ride height brings you closer to the bump stops, and will cause a bouncy, undamped ride.

The kind of bouncy I'm talking about is not hard road texture. I'm talking about low frequency body movements that are not harsh they're just really annoying and stupid. If that's what you're experiencing, I think you can fix it by changing to shorter bump stops.

Quote:
I guess there's no use in arguing with the dealer about it. I'll just have to take a loss on the diagnostic fee they're charging me and try some suspension shops to get their opinions.
If you want I can give you part numbers for bump stops to get, front and rear. Total parts cost will be about $60, install though will be more, maybe $300. If you possibly can, find an independent BMW shop, that is, someone that specializes in BMWs or a small number of models. Not a suspension place.

Maybe you can visit the BMWCCA web site, I think they show a list of member independent shops. Most of them are very good.

No matter where you go, you're going to have a tough time finding anyone who is knowledgable about these kinds of performance issues.

For the alignment and tire stuff, I would go to tirerack.com, look at their list of approved installers, they are rated by customers. Look for the highest rated ones in your area. Tire installers often do alignments and suspension upgrades, and they may even have something to say about your situation.

Hope this helps. And please let us know what happens!
__________________
2007 328i ZSP. M3 suspension: custom valved Bilstein shocks, Hyperco race springs, M3 lower control arms front and rear, M3 sway bars, and M3 subframe bushings. E46 front guide supports. Euro tail lights.
Appreciate 0
      11-18-2011, 05:41 PM   #7
edirtaynine
Major General
65

 
Drives: e92
Join Date: Mar 2011
Location: SoCal


Posts: 6,093
iTrader: (0)

Quote:
Originally Posted by SaMirakle View Post
H... and my head bobs up and down a lot especially on shitty roads.
hahahahha reminds me of my old honda days lol
Appreciate 0
      11-18-2011, 05:47 PM   #8
cvc 22349a
Colonel
United_States
37

 
cvc 22349a's Avatar
 
Drives: 335i
Join Date: Sep 2007
Location: SF Bay


Posts: 2,255
iTrader: (8)

How many miles on the car? If the suspension hasn't been modified, it sounds like you need new shocks.
__________________
2007 E90 335i, TiAg, 6AT, ZPP, ZSP, ZCW, 6FL, HD
Quaife lsd, ETS fmic, GIAC s/w, Dinan intake/exhaust/oc, KW/M3 susp, Apex Arc 8, Mich PSS
Appreciate 0
      11-19-2011, 10:24 PM   #9
luckyu
Lieutenant
14

 
luckyu's Avatar
 
Drives: 2007 328i, 1998 328i
Join Date: Jan 2007
Location: San Francisco Bay Area, California


Posts: 423
iTrader: (1)

Quote:
Originally Posted by cvc 22349a View Post
How many miles on the car? If the suspension hasn't been modified, it sounds like you need new shocks.
I agree, and this is more likely than the bump stop theory, too.
__________________
2007 328i ZSP. M3 suspension: custom valved Bilstein shocks, Hyperco race springs, M3 lower control arms front and rear, M3 sway bars, and M3 subframe bushings. E46 front guide supports. Euro tail lights.
Appreciate 0
      11-20-2011, 11:40 AM   #10
darebornsolja
First Lieutenant
United_States
7

 
Drives: e92
Join Date: Dec 2010
Location: Arcadia


Posts: 307
iTrader: (0)

Plus the stock sports package wheels with run flats are never going to be as smooth as a diff setup. I went with BBS LM's 19's on low pros and its like night and day.
Appreciate 0
Reply

Bookmarks

Tags
bumpy, ride, rough, suspension, uncomfortable

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 -5. The time now is 04:08 AM.




e90post
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