Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E70) Forum
Arnott
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #21  
Old 12-01-2018, 08:47 PM
ard ard is offline
Member
 
Join Date: Mar 2006
Location: Sierra Foothills, California
Posts: 5,141
ard is on a distinguished road
Quote:
Originally Posted by Badsmerf View Post
Why do you treat people so poorly?

Just a mild kick in the arse, to get you the help you need. Glad to see you have moved to a more precise style, citing parts by number!.....


IMO I dont understand how a strut assembly under compression can be 'compressed further' by hand...just shouldnt be possible. you can move the whole strut around, when attached to the wheel and the top released- but this isnt 'compressing'.


If you really can compress the shock, meaning the spring is not pressing the top and resisting a relative compression of the top hat down onto the lower mount, it isnt a strut issue-



IMO, a 'weak strut' will not make noise. It may need replacing, and it may drive better once replaced, but it isnt a source of noise.
Reply With Quote

Sponsored Links

  #22  
Old 12-01-2018, 09:03 PM
Member
 
Join Date: Mar 2017
Location: Iowa
Posts: 32
Badsmerf is on a distinguished road
ard, you drive me crazy sometimes.... When the front end is jacked-up, the system is pretty extended. With the top nut is off, the strut shaft should be free to move. My concern, is that it was too easy to compress. Maybe I just have too much power...
Reply With Quote
  #23  
Old 12-02-2018, 12:19 AM
Member
 
Join Date: May 2009
Location: USA
Posts: 787
FunfDreisig is on a distinguished road
ARD & Badsmerf,

I think the issue is the semantics of “compression”.

Once the top nut AND the wheel are removed, the strut assembly is no longer in compression. The spring is just floating between the Support Bearing Flange (#9) and the flange on the strut/shock. So moving the spring up off of the flange on the strut/shock, in order to replace the lower spring pad MAY require compressing the spring. But it may just require lifting the heavy spring up off of the lower spring pad (#4).

I agree that in and of itself and weak strut should not make noise. But a weak strut can put more impact on the upper and lower Guide Supports (#8 and 10) causing them to fail/disintegrate. When that happens there is play at the Support Bearing Flange (#9) that can cause the metal washer in the top of the dust shield (#6) and/or the large washer (#11) to hit the support bearing flange creating the clunk.

Funf Dreisig
Reply With Quote
  #24  
Old 12-03-2018, 11:21 AM
Toothbrush's Avatar
Member
 
Join Date: Dec 2017
Location: Here and there
Posts: 175
Toothbrush is on a distinguished road
Just to through my two cents in, I had replaced my lower control arms and sway bar links, got it put in alignment per ard's suggested numbers and it felt great... until a while ago it started making a clunk that I couldn't figure out.

Turned out to the be the guide supports (upper part on passenger was mostly gone). I followed this DIY https://xoutpost.com/1107792-post1.html and even used the same type of spring compressor. No more noise or clunking, nice and smooth now.

1st strut was a learning experience, so took a couple hours going slow. 2nd one was about half the time. I picked up all new nuts and only replaced 7, 8, and 10 on the struts in the diagram on the first page:

10 - Upper Guide support 31336776390
8 - Lower Guide support 31336776389
7 - Additional shock absorber, front 31336771892

My clunk was coming from the right side (passenger) and was almost random. Sometimes bumps would cause it, sometimes not.

The spring compressor I used was "Macpherson Strut Spring Compressor Interchangeable Fork Coil Extractor Set" off of amazon and it worked great. I was a bit nervous after watching some videos of people using the hook type improperly, but this set never gave me any issues. (I think it's the same set used in the DIY link)

The only trouble I ran into was trying to get the Strut Mount (#2 in the diagram) off of the passenger side strut, and for some reason getting it back on the drivers side.

Did all this work yesterday, so glad it's done!


Edit: I forgot to mention, when I came back in from the garage my wife was like "are you done already?! that was fast!...." Six or seven hours start to finish (prep, clean up, quick run to the store for a 21mm socket included) = "fast"
__________________
2007 X5 4.8i - 12/06 Build - Silver/Black - 3rd Row

Last edited by Toothbrush; 12-03-2018 at 11:30 AM.
Reply With Quote
  #25  
Old 01-11-2019, 01:04 PM
Member
 
Join Date: Jul 2017
Location: Dallas, TX
Posts: 13
philly42 is on a distinguished road
Quote:
Originally Posted by philly42 View Post
I'm getting a similar sound on the X5M over small bumps. Replaced last year was the thrust-bushing assembly and lower control arms. I was thinking it could be the upper strut mount/guide support, but the X5M design is different where it seems not to have the rubber/foam like standard X5s.

Maybe the rubber/foam is built into the amount and is not serviceable? I ordered new swaybar link and will see if that eliminates the clunk.

(Pics of X5 and X5M mount)
Here's an update on the knocking sound I was getting on the X5M. The tension strut ball joint was quite loose eventhough it was only a year old. Reused an old original arm that had a better ball joint and swapped out the bushing.
replaced the swaybar links.
Checked shocks and shock mount. The rubber inside the X5M's shock mount is not serviceable but appeared to be good...no cracking.

It rides great with no knocking sound.
Attached Images
   
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 03:53 PM.
vBulletin, Copyright 2019, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.