Hey everyone- after thousands of miles on oem, Bilstein B8, Koni Yellows, and VWR coilovers, I am getting that noise on each and every rear shock/coilover that has been on the car. I've been trying to diagnose something that may have been loose, but to no avail. Even my local high-end shop can't find where the noise is coming from.
I just installed a set of Bilstein B14’s coilovers and experienced noise from the rear, which sounded to me like what you are describing.
After checking my install on the rear two times and was convinced it was installed correctly, I decided to disconnect the sway bar and voila the noise was gone.
After thinking about it a while…and drinking some wine to elevate my brain-waves, I then put on my tin foil hat so my ideas would not get stolen.
I have a neuspeed sway bar and neuspeed sway bar end-links installed. The upgraded links allow the (link) base to move freely in all directions. The stock link only allows the bottom connection to move in a semi-circular arc within the control arm…with only the top (part that attaches to the bar) pivoting freely (In a cone shape).
Anyhow….it turns out that the coilover kit changed the suspension geometry enough that the link would bump against the control arm (It sits inside it) and make a real racket.
I simply reinstalled the stock links and all my rear noise was gone.
This obviously only applies to people with aftermarket links…but it may be worth your while to disconnect the sway bar and tie it up just to find out…it is a 5 minute job.
Regards.
Fuelboss and I have exchanged a number of emails with each other about his rear shocks noise and my experience with Bilstein B6 shocks on our own four different VW Golfs since 2002, including our new 2015 Golf S TDI, which we put Bilstein B6 shocks on the very first week, because the stock shocks were very poor performing on any aggressive or poor condition roads.Meanwhile, on only our second set of rear shocks my dealer has declared that he could not hear anything when he test drove the car last week and is therefore "unable to do anything".
Sigh ..
I had my rear shocks replaced 4 months ago. It fixed 80 - 90% of the noise. Although my car started shake/ vibrate at highway speeds (70 mph+). Has anyone else with shock noise been experiencing high speed vibrations?