Front sway bar link clunk with lowering springs

gvisockas · 11-27-2023, 06:38 AM

Hello all,
I installed a set of ST shock absorbers which included lowering springs. Also changed tension strut bushings to the M version. Immediately, I noticed a clunk/knock that's present when going over small bumps (i.e. on a gravel road).

I have seen a few posts concerning this question. Is that common? The car is lowered <30mm (<1.2") at the front. Given that the sway bar is not fixed to the bushings or mounting brackets, this ride height alteration changed sway bar's angle and in turn applied torque, but that should not translate into a clunk right away. Are longer end links required for such lowering?

Jaronbwall · 11-27-2023, 12:40 PM

Bump. I've read mix responses for this question and I'm curious my self. I want to upgrade to the Bilstein B14 kit which has adjustable ride height. I don't want any clunking after install.

335i54n · 11-27-2023, 01:04 PM

my eibach swaybar just taps the m3 arm ride height arm bracket with b14 @ almost stock msport ride height, very minor in my case and not enough for me to worry. i just go over speed bumps slower

gvisockas · 11-27-2023, 03:45 PM

This does not really apply as I have halogen headlights, i.e. no such arm if I understand correctly.

11-27-2023, 06:38 AM	#1
gvisockas New Member 0 Rep 27 Posts Drives: e90 Join Date: Feb 2023 Location: Lithuania iTrader: (0)	Front sway bar link clunk with lowering springs Hello all, I installed a set of ST shock absorbers which included lowering springs. Also changed tension strut bushings to the M version. Immediately, I noticed a clunk/knock that's present when going over small bumps (i.e. on a gravel road). I have seen a few posts concerning this question. Is that common? The car is lowered <30mm (<1.2") at the front. Given that the sway bar is not fixed to the bushings or mounting brackets, this ride height alteration changed sway bar's angle and in turn applied torque, but that should not translate into a clunk right away. Are longer end links required for such lowering?
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11-27-2023, 12:40 PM	#2
Jaronbwall Driving cars and riding bikes really fast 296 Rep 1,023 Posts Drives: 2009 335i Join Date: Sep 2014 Location: Indianapolis iTrader: (0)	Bump. I've read mix responses for this question and I'm curious my self. I want to upgrade to the Bilstein B14 kit which has adjustable ride height. I don't want any clunking after install. __________________ 335i, sport pkg, 3 pedals, Blacked out, LED markers, OZ Ultraleggera wheels, Firestone Indy 500s, x-pipe, vibrant 1792, PE mod MHD stage 2+, BMS DPs, ARM charge pipe, Tial BOV, ARM FMIC, dual cone, CSF radiator, M3 control arms, sways, HAWK pads. https://www.strava.com/athletes/8309149 Follow me on Strava
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11-27-2023, 01:04 PM	#3
335i54n Captain 354 Rep 610 Posts Drives: e90 335i, e39 m5 Join Date: Nov 2020 Location: socal iTrader: (0)	my eibach swaybar just taps the m3 arm ride height arm bracket with b14 @ almost stock msport ride height, very minor in my case and not enough for me to worry. i just go over speed bumps slower
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11-27-2023, 03:45 PM	#4
gvisockas New Member 0 Rep 27 Posts Drives: e90 Join Date: Feb 2023 Location: Lithuania iTrader: (0)	This does not really apply as I have halogen headlights, i.e. no such arm if I understand correctly.
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