Blu_Ray_UK2007 Posted July 1 Share Posted July 1 Has anybody have difficulties putting H&R 35mm springs on their W212? Several months ago, I had them installed on my E350 CDI, and since I retrieved the vehicle, it has been producing a popping noise during certain turning maneuvers at low speeds. Only the gradual rotation speeds, without any additional noise from bumps, etc. The top mounts and bearings were replaced simultaneously. It is driving me to distraction! I have since removed them and substituted the rubber shims at both the bottom and top of the shock, as well as changed the Top Mount/Bearing with a new brand, nevertheless the same noise persists. This weekend, I replaced the shocks with new ones due to a blown shock and installed new 25mm lowering springs; nonetheless, the popping noise persists from the top section of the strut. Do you have any suggestions on the potential cause of this problem or where to begin? I like the aesthetic of the reduced configuration and prefer not to change to the regular height. Quote Link to comment Share on other sites More sharing options...
TDudette Posted July 1 Share Posted July 1 It seems that there may be an issue in the strut tower region, maybe indicating a problem. Quote Link to comment Share on other sites More sharing options...
Blu_Ray_UK2007 Posted July 1 Author Share Posted July 1 It seems like either the spring is attempting to engage the upper rubber shim or excessive pressure is being applied to the bearing during wheel rotation. Audible inside the vehicle and discernible at the top mount behind the hood. At this pace, I will revert to the conventional springs, but I am also concerned that the issue may persist thereafter. Quote Link to comment Share on other sites More sharing options...
clk320x4 Posted July 1 Share Posted July 1 Alternatively, the bearing may not be functioning freely as expected. Is it deployed correctly? Should it be 'them' in the plural form, or is the noise emanating from a single source? Quote Link to comment Share on other sites More sharing options...
Blu_Ray_UK2007 Posted July 1 Author Share Posted July 1 Both parties are engaging in this behavior. I suspect that the bearing is not moving as easily as it ought to. Everything operated well prior to reinstallation of the struts; but, once subjected to load, the noise begins. The springs seemed to be properly positioned. Quote Link to comment Share on other sites More sharing options...
CyberNinja Posted July 1 Share Posted July 1 It may be a remote possibility, but are the springs installed inversely? The flatter end should be oriented towards the top mount; according to WIS document ar32.25-p-1018cw. Quote Link to comment Share on other sites More sharing options...
Blu_Ray_UK2007 Posted July 1 Author Share Posted July 1 Revisited the site this morning! I meticulously completed all tasks as required. Springs oriented correctly, etc. On the ground, still emitting noises like the top mount bearings. 😩 Considering the purchase of OEM bearings for one more attempt. Quote Link to comment Share on other sites More sharing options...
Blu_Ray_UK2007 Posted July 1 Author Share Posted July 1 🫡 Quote Link to comment Share on other sites More sharing options...
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