Rear Suspension Groaning

rccardude909 · 10-11-2010, 05:16 PM

I have a 07 3.0si coupe and I was wondering if anyone has experienced a groaning from the rear when the suspension is loaded unevenly. I.e. going into driveways, going over speedbumps. The first time BMW told me it was the interior panels so they removed all and reassembled with felt tape. But the problem resurfaced within 1 day. Now its been sitting at BMW for 4 days and they still haven't found the problem yet. The car has never been in any accidents nor has it even been modified. Any insight would be greatly appreciated.

mfanatic325 · 10-11-2010, 06:13 PM

Hmm maybe just chassis flex sound? Or the spring rubbing against the control arm/perch? Or just the shocks/struts themselves compressing/decompressing, which affects the possible spring rubbing noise too. I haven't checked on this specific car, but sometimes they put a little rubber casing around the top of the spring, and sometimes that rubs against each other and might cause sounds.

CJW2OO4 · 10-11-2010, 06:44 PM

my 3.0si does the same thing.

EMP07 · 10-11-2010, 08:50 PM

my M coupe does the same thing. Think it might be chassis flex of some sort. dealer could not figure it out either...

Huz-Z · 10-12-2010, 06:44 AM

The rear suspension of my 3.0si roadster is not exhibiting that issue. She's got about 23,000 miles on her, so maybe its something that happens as the suspension gets a few more miles on it.

Cheers!

10-11-2010, 05:16 PM	#1
rccardude909 New Member 0 Rep 5 Posts Drives: 3.0si Join Date: Feb 2010 Location: San Diego iTrader: (0)	Rear Suspension Groaning I have a 07 3.0si coupe and I was wondering if anyone has experienced a groaning from the rear when the suspension is loaded unevenly. I.e. going into driveways, going over speedbumps. The first time BMW told me it was the interior panels so they removed all and reassembled with felt tape. But the problem resurfaced within 1 day. Now its been sitting at BMW for 4 days and they still haven't found the problem yet. The car has never been in any accidents nor has it even been modified. Any insight would be greatly appreciated.
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10-11-2010, 06:13 PM	#2
mfanatic325 ///M-fanatic 193 Rep 3,885 Posts Drives: '01 911 Turbo Join Date: Oct 2007 Location: Cupertino, CA. iTrader: (23)	Hmm maybe just chassis flex sound? Or the spring rubbing against the control arm/perch? Or just the shocks/struts themselves compressing/decompressing, which affects the possible spring rubbing noise too. I haven't checked on this specific car, but sometimes they put a little rubber casing around the top of the spring, and sometimes that rubs against each other and might cause sounds.
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10-11-2010, 06:44 PM	#3
CJW2OO4 Major 148 Rep 1,100 Posts Drives: E86M,M2,F13 E86&E85M,E86,2E46 Join Date: Apr 2010 Location: Boston iTrader: (4)	my 3.0si does the same thing.
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10-11-2010, 08:50 PM	#4
EMP07 First Lieutenant 37 Rep 398 Posts Drives: Z4M Join Date: Dec 2008 Location: Bay Area iTrader: (6)	my M coupe does the same thing. Think it might be chassis flex of some sort. dealer could not figure it out either...
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10-12-2010, 06:44 AM	#5
Huz-Z Brigadier General 846 Rep 4,057 Posts Drives: Z4 3.0si, 328 XDrive, X5 35i Join Date: Aug 2009 Location: Canada iTrader: (0)	The rear suspension of my 3.0si roadster is not exhibiting that issue. She's got about 23,000 miles on her, so maybe its something that happens as the suspension gets a few more miles on it. Cheers! __________________ Huz-Z BMW Z4 3.0si Roadster. Montego Blue Metallic. Premium and Sport Package.
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