E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

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!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > E46 BMW > E46 Xi Forum

E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 11-07-2012, 06:59 PM   #1
Gasman208
Registered User
 
Join Date: Nov 2012
Location: Ottawa Canada
Posts: 12
My Ride: 325 Xi, 128 coupe
polyurethane bushes

Does anyone have real word experience of using poly bushings in the front suspension. I read the enthusiastic advertising literature on poly Vs. rubber, but what are they like to live with.
Gasman208 is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 11-07-2012, 10:27 PM   #2
redbull 325is
Registered User
 
Join Date: Jul 2006
Location: NC
Posts: 699
My Ride: 325xit/6
Send a message via AIM to redbull 325is
Very positive from numerous RWD cars i've installed them on, never have installed them on an XI but i've heard several people here are happy with the powerflex units.
__________________
Royal Elite Club of 6 Speed Tourings - founder

Last edited by redbull 325is; 11-07-2012 at 10:27 PM.
redbull 325is is offline   Reply With Quote
Old 11-08-2012, 10:47 AM   #3
athayer187
Registered User
 
Join Date: Mar 2008
Location: Meriden, CT
Posts: 155
My Ride: 2004 330xi
Powerflex are a good alternative to OEM, they're much easier to install and firm up the car a little bit. Make sure you grease them well with the included grease, and they'll last a while with no squeaking.

On a side note, I ran Powerflex bushings for a few years but have recently (last 20-30k miles) switched to AKG bushings. They're much firmer, and unless you use the proper grease they squeak, but they last forever. I usually only got about 40-50k miles out of a set of Powerflex control arm bushings.

Final note - use E36 M3 bushings. They're the same diameter, but centered (rather than the slight eccentric on the XI bushings), so they're much easier to install correctly. You may need an alignment afterwards, but it will still align close to factory specs.
__________________

1988 535is - EAT chip, style 5 wheels for track, style 29 wheels for street, urethane UCAB's,
urethane trans mounts, 500/450 IE Coilovers, UUC SSK, Mason Engineering strut bars,
Hella H1/H4 headlights, Schroth Rallye 3's, Dinan 25/19 swaybars, 750i brakes
2004 330xi - stock except for UUC SSK, RE RSM's, Koni Yellows, UUC TSE1

Last edited by athayer187; 11-08-2012 at 10:48 AM.
athayer187 is offline   Reply With Quote
Old 11-10-2012, 08:10 AM   #4
dpgrand
Registered User
 
Join Date: Nov 2006
Location: Providence, RI
Posts: 1,282
My Ride: 2005 330xi
I am running the powerflex in my front control arms and simply because of the ease of install they are awesome.
__________________
'05 330xi - Koni, H&R, Rogue, Supersprint, UUC, Dinan, Apex
dpgrand is offline   Reply With Quote
Old 11-10-2012, 07:41 PM   #5
325xittt
Registered User
 
Join Date: Apr 2010
Location: Reading, PA
Posts: 172
My Ride: 2003, 325 XIT
love my PowerFlex FCABS and sway bar bushings.
__________________
325xittt is offline   Reply With Quote
Old 11-10-2012, 08:44 PM   #6
Shadow330xi
Registered User
 
Join Date: Sep 2012
Location: Colorado Springs
Posts: 112
My Ride: 2001 Red 330xi
Im running both powerflex for both my FCARB and RTAB and love them.
Shadow330xi is offline   Reply With Quote
Old 11-11-2012, 09:04 AM   #7
Gasman208
Registered User
 
Join Date: Nov 2012
Location: Ottawa Canada
Posts: 12
My Ride: 325 Xi, 128 coupe
Thanks to all.
My 325Xi is a smooth and comfortable Sports Sedan who's steering has started to get a little "Chevy like"
I want to regain the precision but not turn it into a go-cart.
Looks like Powerflex is the way to go.
Gasman208 is offline   Reply With Quote
Old 11-13-2012, 07:16 AM   #8
bikesandcars
Registered User
 
Join Date: Oct 2012
Location: Allentown, PA
Posts: 146
My Ride: 2002 325xi-sport pkg
Road test to ensue shortly, but from a mechanic standpoint they are awesome.. if they ever wear out it's a simple replacment of the inner "purple" piece, not taking the bushing off, pressing it out, etc. worth it in my opinion... oh yea... much more solid and less suspension stiction

side note... not to start a wild divergence...I use Silver Anti-Sieze by permatex on all my poly bushings with great results. When I opened the tube of "lube" sent by powerflex it looked like "copperslip"..... copper based anti-sieze.. I saved those packets for another day

Last edited by bikesandcars; 11-13-2012 at 07:17 AM.
bikesandcars is offline   Reply With Quote
Old 11-13-2012, 11:51 AM   #9
Gasman208
Registered User
 
Join Date: Nov 2012
Location: Ottawa Canada
Posts: 12
My Ride: 325 Xi, 128 coupe
I Look forward to hearing how the road test went.
Were the supplied bushings of the asymmetrical type, that is what seems to be shown for the Xi.
The factory bushings seem symmetrical, so the change will affect the suspension geometry.
Gasman208 is offline   Reply With Quote
Old 11-13-2012, 07:00 PM   #10
325xittt
Registered User
 
Join Date: Apr 2010
Location: Reading, PA
Posts: 172
My Ride: 2003, 325 XIT
Factory xi bushings are also asymmetrical (I know I've replaced several sets). its hard to tell if the bushing is really worn out. It is also explained in the Bentley manual. I believe the hole offset should be placed towards the center of the car per OE spec.
__________________
325xittt is offline   Reply With Quote
Old 11-13-2012, 09:46 PM   #11
Kubica
Registered User
 
Join Date: Apr 2008
Location: Boston
Posts: 4,351
My Ride: 2003 325xi
I have news for you guys- the stock bushings are worn after 5k miles. Buy the centered powerflex for e36 m3. Use the grease that comes with them. Measure. Then never worry about FCABS again.
Kubica is online now   Reply With Quote
Old 11-14-2012, 08:32 AM   #12
athayer187
Registered User
 
Join Date: Mar 2008
Location: Meriden, CT
Posts: 155
My Ride: 2004 330xi
Only stuff I found to work better than anti sieze is this:

http://www.amazon.com/Energy-Suspens...pension+grease

It's a teflon based lubricant, so it's sticky, slippery, and stays put. I found anti sieze to dry out after a few months and start to prevent movement (especially in cold salty conditions!).
__________________

1988 535is - EAT chip, style 5 wheels for track, style 29 wheels for street, urethane UCAB's,
urethane trans mounts, 500/450 IE Coilovers, UUC SSK, Mason Engineering strut bars,
Hella H1/H4 headlights, Schroth Rallye 3's, Dinan 25/19 swaybars, 750i brakes
2004 330xi - stock except for UUC SSK, RE RSM's, Koni Yellows, UUC TSE1
athayer187 is offline   Reply With Quote
Old 11-14-2012, 09:01 AM   #13
bikesandcars
Registered User
 
Join Date: Oct 2012
Location: Allentown, PA
Posts: 146
My Ride: 2002 325xi-sport pkg
Quote:
Originally Posted by athayer187 View Post
Only stuff I found to work better than anti sieze is this:

http://www.amazon.com/Energy-Suspens...pension+grease

It's a teflon based lubricant, so it's sticky, slippery, and stays put. I found anti sieze to dry out after a few months and start to prevent movement (especially in cold salty conditions!).
I've heard great things about that stuff, I should get some to keep around the shop. What I also heard is don't let it touch anything you don't want lubrication on (including you!) it works "too good".
bikesandcars is offline   Reply With Quote
Old 11-15-2012, 07:41 PM   #14
Brandjas18
Registered User
 
Join Date: Apr 2010
Location: St. Paul, MN
Posts: 81
My Ride: 330i ZHP
Can someone post the PN for suggested E36 M3 FCABs please? Also would you suggest replacing any other front suspension components at the sometime? I will likely use an Indy shop and do an alignment at the same time. My XI has 105k and the steering wheel shakes abut around 55 mph. After reading a bit it sounds like its FCABs gone bad.
__________________
Saint Paul, MN

2003 E46 330i ZHP (Silver Grey) - Current
2002 E46 325xi Touring (Schwarz) - Current
2002 E46 M3 (Steel Grey) - Sold
1995 E36 M3 (Alpine)- Sold
1995 E36 M3 (Cosmos) - Sold
Brandjas18 is offline   Reply With Quote
Old 11-15-2012, 09:18 PM   #15
Rice4bfast
Registered User
 
Join Date: Apr 2012
Location: Jersey
Posts: 68
My Ride: 325xi Touring
Quote:
Originally Posted by shadow330xi View Post
im running both powerflex for both my fcarb and rtab and love them.
+1
Rice4bfast is offline   Reply With Quote
Old 11-16-2012, 08:27 PM   #16
325xittt
Registered User
 
Join Date: Apr 2010
Location: Reading, PA
Posts: 172
My Ride: 2003, 325 XIT
I don't have any direct knowledge for use of the centered e36 m powerflex bushings on the xi. Many people swear by them for the XI. I think they were likely the best option before Powerflex apparently redesigned the xi bushing and corrected some of their earlier issues with this bushing.

Maybe there are other differences but from what I can tell (I'm sure I will be corrected in a very polite manner) The e36 m and the xi versions appear to be very similar in design and material, A firm rubber outer bushing with a Poly blue/purple inner bushing. I don't know if there are differences in durometers in the materials. Maybe someone who has used both can chime in here but i suspect they are the same. The main difference touted is that the e36 m version is centered where as the xi is offset slightly as per the OE FCAB. To some this is an important difference, maybe especially if you track your car and/or have otherwise altered the geometry. There is much debate on this point. For me I choose to trust the BMW engineers and I use the xi version which keeps the OE geometry with my stock OE ride height. My car is a daily driver and it aligned beautifully and handles really nice I'm very pleased.

The other difference is that the new XI bushing design fills the entire gap between the lollypop carrier and the shoulder on the end of the arm, where as the E36 M version leave a gap of about 10 mm when installed. For some this is not a problem, but some have resorted to filling the gap with a hose clamp to keep the bushing in place.

I may be missing some other important distinctions and maybe others can fill in the gaps. I just raise these points of distinction between the e36 M and the XI specific bushing so that you and others can make an informed decision and decide if this is a proper modification to your car. Despite the differences in the two designs I think most everyone who has use the powerflex bushing has reported favorably, though I am sure some will disagree
__________________
325xittt is offline   Reply With Quote
Old 11-19-2012, 12:49 AM   #17
Thotfulspot
Registered User
 
Join Date: Apr 2011
Location: Chicago
Posts: 212
My Ride: 2003 330Xi
TC Kline is building a coilover setup for my 2003 XI and TC was pretty adamant that rubber bushings should be used. I've used poly on my Rovers and never felt a difference.
Thotfulspot is offline   Reply With Quote
Old 11-19-2012, 06:03 AM   #18
325xittt
Registered User
 
Join Date: Apr 2010
Location: Reading, PA
Posts: 172
My Ride: 2003, 325 XIT
If you stick with rubber bushings, get OEM they will last a lot longer then the cheap stuff.
__________________
325xittt is offline   Reply With Quote
Old 11-19-2012, 05:42 PM   #19
Thotfulspot
Registered User
 
Join Date: Apr 2011
Location: Chicago
Posts: 212
My Ride: 2003 330Xi
Unless there is something proven better than OEM that's all I use.
Thotfulspot is offline   Reply With Quote
Reply

Tags
bushes, poly

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Censor is ON





All times are GMT -5. The time now is 05:11 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use