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
  #1  
Old 12-20-2010, 07:46 PM
Member
 
Join Date: Dec 2009
Location: USA
Posts: 305
ABMW is on a distinguished road
Strange fix for trunk rattle

Hi all,

During the last 12 months, I've owned a 2010 35D and a 2011 35D. Both had horribly loud trunk rattling, that started at around the 2,000 mile mark.

I'm running 20" 214s on the 2011 35D, and it was extremely loud. I checked the air pressure, and found my tires inflated to 30 psi cold. I inflated them to 42 psi, as I have a long trip coming up, and am going off the above 100 mph. psi. chart.

Not only does the car handle 50% better, but the trunk rattle is entirely gone. I mean 100% gone, instantly. I've been wracking my brain for days now trying to figure out how tire pressure could have an effect on the infamous trunk rattle so many of us are faced with.

It's almost like a plague for the E70s, but no matter what I throw at the vehicle it's gone. I do have adaptive drive. I'm wondering if the vehicle compensated its suspension in some manner, to adjust for the increased air pressure, or if the lower tire pressure was allowing the chassis to flex 1% or 2% more than it should, but those explanations are pretty far out there.

Anyone else have any thoughts or similar experiences?
Reply With Quote

Sponsored Links

  #2  
Old 12-20-2010, 09:29 PM
Member
 
Join Date: Sep 2010
Location: Boston
Posts: 82
Gregory34 is on a distinguished road
No 'similar experience' other than the fact that my trunk rattle comes and goes when I get a car wash... I think whatever's rattling just gets stuck (for lack of a better term) now and then, but always comes back...
Reply With Quote
  #3  
Old 12-20-2010, 10:38 PM
JCL's Avatar
JCL JCL is offline
Premier Member
 
Join Date: Mar 2005
Location: Vancouver, Canada
Posts: 11,853
JCL will become famous soon enoughJCL will become famous soon enough
30 psi was too low, but where in the US are you able to drive with 4/5 passengers and a full load of luggage, at over 100 mph for any extended periods? 42 psi in the rear seems excessive. I can see 35 psi in the fronts; I never went above that for the rears when fully loaded. Most of the time I used 32 front and rear.

You won't have proved any connection with tire pressure until you put them up, and then back down, through a few cycles, and see if the noise comes and goes with the pressure increases.
__________________
2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver

2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
Reply With Quote
Reply

Bookmarks

Tags
rattle, rear hatch

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 12:12 PM.
vBulletin, Copyright 2024, 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.