[A4] Rear suspension clunk/rattle

Scott Sierakowski audisscott at sbcglobal.net
Mon Jun 28 13:00:10 EDT 2004

I'd check two things:

First, if you have coilovers and the car is very low
there isn't much or any preload in the spring.  When
you go over bumps there is no load on the spring when
the car is at the top of this bump motion and the
spring rattles around a bit before the weight of the
car comes to rest on the spring again.

Second, after adding suspension some people have
noticed very fast wear of the rear sway bar bushings. 
Check if there is any play in there too.

Good Luck,


--- Quincy Chiang <b5quattro at shaw.ca> wrote:
> Hi all, 
> I recently had Stasis Tracksport coilovers installed
> on my S4, and it's been great so far.  That is until
> 2 days ago, when I started hearing clunking/rattling
> coming from the rear when I drove over bumps, mostly
> on the driver side.  The noise isn't that bad,
> normally I can't hear it with the windows closed,
> but when they're opened, you can definitely hear it.
> I did a search in the AW archive and looked through
> the coilovers install tech article, seems like the
> most probable cause are the 4 bolts attaching the
> rear shock tower to the body are loose.  Well I
> checked them this afternoon and they're all tight
> and I re-torqued them to 41 ft-lb for good measure. 
> I test drove afterwards, and the rattle/clunk is
> still there, right when the rear wheels go over the
> bumps.
> Can anyone enlighten me on what else can it be?  My
> car's still under warranty, but since I have
> aftermarket suspension, I think the dealer will use
> it against me and relate all suspension stuff to the
> Stasis coilvers.
> Thanks in advance and I really appreciate the input.
> Quincy
> '01.5 S4
> '90 CoupeQ
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