Low speed front end clunk

biggripper · 11-15-2023, 03:28 PM

I’ve noticed that my 24 M3 xDrive sometimes has this strange clunkiness from the front end during low speed parking lot maneuvers. I’m running 15mm spacers up front and I’m wondering if they might be the issue. I don’t hear any rubbing and I don’t see evidence or rubbing on the fender liners either. Stock suspension. Michelin tires. No other suspension or wheel mods outside the spacers. I installed the spacers pretty much as soon as I got the car to I don’t recall if the issue was present prior to install.

I’ll be honest, those 15mm spacers are so thick I was a little paranoid about using them. I know plenty of people run 15mm and some run even larger spacers.

Car is under 3k miles no other suspension or brake issues.

Anyone else experience this?

stormlv · 11-15-2023, 04:07 PM

If it's a metallic clunk that you're hearing it might be the wheels slipping on the rotor or between the rotor hat and the wheel bearing hub

https://www.bimmerworld.com/Brakes/B...108053073.html

I know that on my old M4 (F82) I had these also between the rotors and the wheels.

coldsteelrain · 11-15-2023, 06:27 PM

Try torquing your lug nuts to 125 ft/lbs

KANdaddy · 11-18-2023, 10:10 AM

I noticed the same thing. Will have dealer look at it next service. Car will still be under warranty anyway.

biggripper · 11-19-2023, 02:38 PM

Quote:

Originally Posted by KANdaddy

I noticed the same thing. Will have dealer look at it next service. Car will still be under warranty anyway.

I suspect that it’s normal and has something to do with the xDrive.

LuvMyE92 · 11-20-2023, 07:31 AM

Remove the spacers and see if it still does it.

biggripper · 11-20-2023, 08:23 AM

Quote:

Originally Posted by LuvMyE92

Remove the spacers and see if it still does it.

Agree that would be the most logical diagnostic measure to take. Just kinda a pain especially since I don’t currently have an easy way to do that at home. I do have lift access at the shop on base it would be a matter of finding the time. I do have a buddy her local that says his car does the same thing so I’m a little less worried now.

Berzerker · 11-20-2023, 09:15 AM

Was this not recently discussed here as well? If you're talking about hard turns you may be experiencing the Ackerman effect. It's quite common in most cars at low speeds during hard maneuvers. Spacers may exaggerate the effect as well since you're changing the width between the two sets of wheels.

https://www.mcgrathautoblog.com/auto...ette-stingray/

11-15-2023, 03:28 PM	#1
biggripper Captain 728 Rep 649 Posts Drives: 2024 G80 M3 Comp xDrive Join Date: Feb 2015 Location: UK iTrader: (0)	Low speed front end clunk I’ve noticed that my 24 M3 xDrive sometimes has this strange clunkiness from the front end during low speed parking lot maneuvers. I’m running 15mm spacers up front and I’m wondering if they might be the issue. I don’t hear any rubbing and I don’t see evidence or rubbing on the fender liners either. Stock suspension. Michelin tires. No other suspension or wheel mods outside the spacers. I installed the spacers pretty much as soon as I got the car to I don’t recall if the issue was present prior to install. I’ll be honest, those 15mm spacers are so thick I was a little paranoid about using them. I know plenty of people run 15mm and some run even larger spacers. Car is under 3k miles no other suspension or brake issues. Anyone else experience this? __________________ CURRENT///G80 M3CX \| Isle Of Man Green \| Kyalami Orange \| Bi-Color 826M Wheels FORMER ///F80 M3 ZCP \| Yas Marina Blue \| Black \| DCT \| Black 666M Wheels FORMER ///F87 M2C \| Alpine White/Orange \| DCT \| Black 788M Wheels FORMER ///F87 M2C \| Sunset Orange/Orange \| 6MT \| Black 788M Wheels FORMER ///F82 M4 \| SSII \| Full SO \| 6MT \| Black 437M Wheels
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11-15-2023, 04:07 PM	#2
stormlv Human 935 Rep 1,202 Posts Drives: Yes Join Date: Nov 2013 Location: Geneva iTrader: (1)	If it's a metallic clunk that you're hearing it might be the wheels slipping on the rotor or between the rotor hat and the wheel bearing hub https://www.bimmerworld.com/Brakes/B...108053073.html I know that on my old M4 (F82) I had these also between the rotors and the wheels. __________________ 2023 BMW M4 CP xDr \| 510HP / 650Nm \| Isle of Man Green \| Photo album Sold 2018 BMW M4 DCT / ZCP\| 450HP / 550Nm \| Sakhir Orange \| Photo album \| Tribute Sold 2014 BMW 435xd \| 360HP / 710Nm \| Estoril Blue \| Photo album 2010 BMW Z4 sDrive35i DKG \| 306 HP / 400Nm \| Space Gray \| Photo album
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11-15-2023, 06:27 PM	#3
coldsteelrain driver 820 Rep 781 Posts Drives: G80 xdrive Join Date: May 2018 Location: NJ iTrader: (4)	Try torquing your lug nuts to 125 ft/lbs
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11-18-2023, 10:10 AM	#4
KANdaddy Colonel 2508 Rep 2,819 Posts Drives: 22 M3C XDrive-Ind Grey Blk Join Date: Nov 2008 Location: Cali iTrader: (5)	I noticed the same thing. Will have dealer look at it next service. Car will still be under warranty anyway. __________________
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11-20-2023, 07:31 AM	#6
LuvMyE92 Occasionally frequent poster 3007 Rep 2,745 Posts Drives: CT5V-Blackwing Join Date: Jan 2008 Location: RTP NC, USA iTrader: (0)	Remove the spacers and see if it still does it. __________________ Current inventory: F22 & G05 Cadillac CT5-V Blackwing w/3 pedals Past: E24,E28(3),E34,E36,E37,E38(2),E39(4),E46,E89,E92 (obviously),F01,F06,F10,F30,F87,G12,G30(2),G82(2)
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11-20-2023, 09:15 AM	#8
Berzerker Colonel 3052 Rep 2,713 Posts Drives: 2024 M4 Convertible Join Date: Jun 2017 Location: USA iTrader: (0) Garage List 2024 BMW M4 Convert ... [0.00]	Was this not recently discussed here as well? If you're talking about hard turns you may be experiencing the Ackerman effect. It's quite common in most cars at low speeds during hard maneuvers. Spacers may exaggerate the effect as well since you're changing the width between the two sets of wheels. https://www.mcgrathautoblog.com/auto...ette-stingray/
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