Click to go to Forum Home Click to go to maXbimmer Home

Go Back   maXbimmer Forums > maXimum Tech > 3 Series > E46 (1998 - 2005)
User Name
Password


Welcome to Maxbimmer.com!

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

Reply
 
Thread Tools Rate Thread Display Modes
Old 07-15-2014, 04:28 AM   #1
Bmwstylz
6th Gear Member
 
Bmwstylz's Avatar
 
Join Date: Oct 2004
Location: Nurburgring
Posts: 1,370
Question Front Control Arm Bushings - the dreaded wobble

i have the typical wobble under braking in steering wheel. mostly 100km down to 80km... car fairly smooth at other speeds during braking. no real vibration in brake pedal.

i'm pretty sure its the FCABs. I want to do just the bushings not complete control arms. The repair looks pretty straightforward on pelican parts.

has anybody done this themselves? easy to hammer off or do I really need to start cutting?
__________________
"Get rich or die tryin!"
Bmwstylz is offline   Reply With Quote
Old 07-15-2014, 06:18 AM   #2
DET1990
2nd Gear Member
 
Join Date: May 2012
Location: mississauga
Posts: 247
You can use a 3 jaw puller to pull it off the control arm when ive done it i cut the outer part off then use the puller on the remaining piece of rubber install is kinda tough with the stock bushings but can be done
DET1990 is online now   Reply With Quote
Old 07-15-2014, 08:35 AM   #3
cirrusblau
3rd Gear Member
 
Join Date: Mar 2008
Location: GTA
Posts: 360
I managed to get new Meyle HD bushings on by hand with just some dishsoap, working under the car. The hardest part was getting it started. Once it was on, it slid home with (relative) ease.

+1 on the 3 jaw to get it off.
__________________
Parts for Sale (Updated 2014-04-10) http://ethirty.velcomweb.ca/
cirrusblau is offline   Reply With Quote
Old 07-15-2014, 01:36 PM   #4
rmanaudio
3rd Gear Member
 
Join Date: Apr 2005
Location: Vaughan
Posts: 336
FCAB are really easy to replace M or non-m. Just hold the old ones off and put some WD-40 between the groves and pull or hammer it out. When installing the news ones use liquid dish soup and gently hammer it back on and bolt it up.

I doubt it will solve your issue. Usually vibrations under braking is caused by either warped rotors or rim or tire issues.
rmanaudio is online now   Reply With Quote
Old 07-15-2014, 01:42 PM   #5
cirrusblau
3rd Gear Member
 
Join Date: Mar 2008
Location: GTA
Posts: 360
When my FL CAB failed (well, when I bought the car with a bad one), I needed to do a minor steering adjustment when I hit the brakes to counteract the extra angle on the FL wheel.

There was never any vibration like what is typical of bad ball joints.

To the OP, raise the front of the car and with the steering wheel locked and for each of the front wheels, grab them at 3 and 9 and wiggle. If it wiggles, good chance it's your CAB.
__________________
Parts for Sale (Updated 2014-04-10) http://ethirty.velcomweb.ca/
cirrusblau is offline   Reply With Quote
Old 07-16-2014, 04:21 AM   #6
Bmwstylz
6th Gear Member
 
Bmwstylz's Avatar
 
Join Date: Oct 2004
Location: Nurburgring
Posts: 1,370
good tips indeed.. yeah I don't want to replace them for no reason. maybe it is the rotors?

i will try the wiggle test first
__________________
"Get rich or die tryin!"
Bmwstylz is offline   Reply With Quote
Old 07-16-2014, 09:33 AM   #7
jabela
4th Gear Member
 
Join Date: Apr 2007
Location: Toronto, ON, Canada
Posts: 752
It's highly unlikely that your rotors are warped. I've never heard of one BMW with actually warped OEM rotors. Maybe your 318ti came with shitty chinese rotors or something. More likely is uneven pad deposits or rusty rotors. Bedding your brakes in usually fixes that.

If you've never replaced your FCABs, they are likely shot. How many KMs on the 318ti?
You can also check by having someone drive slowly and hitting the brakes while watching from the the side. If you see the wheel move relative to the car body then your FCABs are shot.

I used a 2 jaw puller (3 jaw is better) to pull the FCAB off the arm. I replaced them with Powerflex Urethane bushings. I'm pretty happy with them. What's nice is that they're the whole assembly, so you don't have to tear out the old bushing and press in the new ones.
Check your size especially with your oddball 318ti.

http://store.bimmerworld.com/powerfl...hing-p281.aspx

http://youtu.be/PuXbK-g_zfM
http://youtu.be/1pJYBjXk8YE
__________________

2002 E46 325ci // 5spd // ISC N1 Coilovers
www.modernapothecary.ca
jabela is offline   Reply With Quote
Old 07-16-2014, 09:58 AM   #8
rmanaudio
3rd Gear Member
 
Join Date: Apr 2005
Location: Vaughan
Posts: 336
If you put on your RIMs the wrong way, you can warp your rotors. Rotors can warp on any car. If you have a box setup, move your rear tires to the front and test.
rmanaudio is online now   Reply With Quote
Old 07-16-2014, 10:05 AM   #9
jabela
4th Gear Member
 
Join Date: Apr 2007
Location: Toronto, ON, Canada
Posts: 752
Quote:
Originally Posted by rmanaudio View Post
If you put on your RIMs the wrong way, you can warp your rotors. Rotors can warp on any car. If you have a box setup, move your rear tires to the front and test.
What do you mean the wrong way?

If there's not a clean surface between the wheel and rotor that can cause vibrations, though that would most likely happen at all times and not just under braking.

Bad alignment can also cause lots of issues. Always good to check that and mandatory after replacing FCABs.
__________________

2002 E46 325ci // 5spd // ISC N1 Coilovers
www.modernapothecary.ca
jabela is offline   Reply With Quote
Old 07-16-2014, 10:37 AM   #10
cirrusblau
3rd Gear Member
 
Join Date: Mar 2008
Location: GTA
Posts: 360
An alignment may be a good idea after FCABs, but I wouldn't say mandatory. So long as the car was aligned while they were good, I don't believe the minor variance from one set of FCABs to the other would cause much difference.

If the alignment was done with bad bushings (which I believe any reputable shop would advise against), then could have all sorts fun front end geometry after FCAB replacement haha
__________________
Parts for Sale (Updated 2014-04-10) http://ethirty.velcomweb.ca/
cirrusblau is offline   Reply With Quote
Old 07-16-2014, 10:47 AM   #11
blk3
4th Gear Member
 
blk3's Avatar
 
Join Date: Nov 2009
Location: Oshawa On Canada
Posts: 827
I had the same symptoms as you with my car. It was the bushings that caused it. If you had warped rotors you would have the shake under braking at pretty much all speeds. I got some poly bushings and haven't changed them since
__________________
blk3 is offline   Reply With Quote
Old 07-17-2014, 04:40 AM   #12
Bmwstylz
6th Gear Member
 
Bmwstylz's Avatar
 
Join Date: Oct 2004
Location: Nurburgring
Posts: 1,370
Quote:
Originally Posted by blk3 View Post
I had the same symptoms as you with my car. It was the bushings that caused it. If you had warped rotors you would have the shake under braking at pretty much all speeds. I got some poly bushings and haven't changed them since
that's exactly what I thought. the brakes are smooth at all speeds with no pedal pulsation.

on the flip side I had a 320i e46 with horrible wheel vibrations and a new set of rotors transformed the car !
__________________
"Get rich or die tryin!"
Bmwstylz is offline   Reply With Quote
Old 08-07-2014, 10:16 AM   #13
Bmwstylz
6th Gear Member
 
Bmwstylz's Avatar
 
Join Date: Oct 2004
Location: Nurburgring
Posts: 1,370
So I finally did the wiggle test with hands at 9 and 3 position. The wheel makes a clicking noise back and forth and comes out maybe 5mm? each way.

I can see the FCAB and it doesn't really move at all.

But the whole wheel and brake rotor wiggle together and 'click' as I push each hand.

I'm thinking now it must be the wheel bearing that needs replacement? There is no noise from it on this side of the car (but oddly enough the other side is slightly noisy at speed and under load (while cornering).

Could a worn wheel bearing produce vibration in the steering wheel under high speed braking?
__________________
"Get rich or die tryin!"
Bmwstylz is offline   Reply With Quote
Old 08-07-2014, 11:38 PM   #14
cirrusblau
3rd Gear Member
 
Join Date: Mar 2008
Location: GTA
Posts: 360
Are you sure you're looking at the bushing (and not the carrier) of the FCAB? 5 mm is a lot of movement for just a wheel bearing. I'd say that if your wheel and brake rotor wiggle relative to the caliper, then you've got a bad bearing.

Noisy under cornering one way is generally a sign you've got a bad bearing.

And yes, a wheel bearing with that much play would no doubt cause vibration under high speed braking. Better change the bearing before the wheel falls off :p
__________________
Parts for Sale (Updated 2014-04-10) http://ethirty.velcomweb.ca/
cirrusblau is offline   Reply With Quote
Old 08-08-2014, 06:14 PM   #15
Bmwstylz
6th Gear Member
 
Bmwstylz's Avatar
 
Join Date: Oct 2004
Location: Nurburgring
Posts: 1,370
yah i was looking at where the metal control arm goes into the bushing. it was hardly moving at all even under heavy shaking of the wheel.

hmm yah i better get those wheel bearings done methings
__________________
"Get rich or die tryin!"
Bmwstylz is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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 On

Forum Jump


All times are GMT -4. The time now is 05:14 PM.


Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.