*Help!* Metal Popping Noise (KWv3 Coilovers Installed)

Falcon Keeper · 10-03-2011, 02:41 PM

It's been about a little over a month trying to find were this noise is coming from and narrowed it down to the rear drivers side shock strut area. The problem is it fine when driven on smooth roads or highways but the very first minute I get onto a main road that is somewhat bumpy, it has a loud popping noise as if the nut on top shock strut is loose and the strut itself travels up and hits the subframe or something to that effect. I got the car jacked up and took the trunk lining out and the wheel off and nothing is damaged or show signs of cracking, bending, buckling, chaffing, rubbing or gouging. All the nuts and bolts are present and accounted for and they are all tight! Does anyone know what could be causing this?

BTW, my car is not slammed compared to some M3's and it is only located on the drivers rear wheel well area. I thought I may have been riding on my bump stop but if that was the cause, wouldn't I be getting this noise from the other side as well??? WTF gives?

For a quick reference, from the ground to my fender measures 26" on both sides in the rear. Thanks for the help!

HP Autosport · 10-03-2011, 03:22 PM

Quote:

Originally Posted by Night Hawk

It's been about a little over a month trying to find were this noise is coming from and narrowed it down to the rear drivers side shock strut area. The problem is it fine when driven on smooth roads or highways but the very first minute I get onto a main road that is somewhat bumpy, it has a loud popping noise as if the nut on top shock strut is loose and the strut itself travels up and hits the subframe or something to that effect. I got the car jacked up and took the trunk lining out and the wheel off and nothing is damaged or show signs of cracking, bending, buckling, chaffing, rubbing or gouging. All the nuts and bolts are present and accounted for and they are all tight! Does anyone know what could be causing this?

BTW, my car is not slammed compared to some M3's and it is only located on the drivers rear wheel well area. I thought I may have been riding on my bump stop but if that was the cause, wouldn't I be getting this noise from the other side as well??? WTF gives?

For a quick reference, from the ground to my fender measures 26" on both sides in the rear. Thanks for the help!

Double check on the rear damper top nut, make sure that is fully seated and properly torqued.

Eugene-TAIWAN · 10-03-2011, 06:57 PM

Yep! Harold is a great guy!

Richard@M-World · 10-04-2011, 12:23 AM

I would uninstall and retorque the shock top nut and the shock bottom bolt on the camber arm.

Torque to:
Top nut: 30 ft-lb
Bottom bolt: 75 ft-lb

GL!

Falcon Keeper · 10-04-2011, 12:32 AM

Cool, Thanks! I will try that out and see if that fixes the problem. Any more help or ideas are appreciated...

Krozi · 10-04-2011, 12:56 AM

Happened to me too. It's the top nut!

10-03-2011, 02:41 PM	#1
Falcon Keeper USAF/ Veteran/ F-16 Crew Chief 59 Rep 384 Posts Drives: 2018 Atlantis Blue Metallic M4 Join Date: Mar 2008 Location: Phoenix, AZ. iTrader: (0) Garage List 2012 BMW E92 M3 [0.00]	Help! Metal Popping Noise (KWv3 Coilovers Installed) It's been about a little over a month trying to find were this noise is coming from and narrowed it down to the rear drivers side shock strut area. The problem is it fine when driven on smooth roads or highways but the very first minute I get onto a main road that is somewhat bumpy, it has a loud popping noise as if the nut on top shock strut is loose and the strut itself travels up and hits the subframe or something to that effect. I got the car jacked up and took the trunk lining out and the wheel off and nothing is damaged or show signs of cracking, bending, buckling, chaffing, rubbing or gouging. All the nuts and bolts are present and accounted for and they are all tight! Does anyone know what could be causing this? BTW, my car is not slammed compared to some M3's and it is only located on the drivers rear wheel well area. I thought I may have been riding on my bump stop but if that was the cause, wouldn't I be getting this noise from the other side as well??? WTF gives? For a quick reference, from the ground to my fender measures 26" on both sides in the rear. Thanks for the help! __________________ - Greg Professional Table Flipper
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10-03-2011, 06:57 PM	#3
Eugene-TAIWAN Brigadier General 249 Rep 3,157 Posts Drives: E92 M3 Coupe Join Date: Jun 2009 Location: Taiwan iTrader: (4)	Yep! Harold is a great guy! __________________ Past: Gintani stage3 M3, Cayman GTS present: Porsche 993RWB, 964RS America,996 cupcar, 964 turbo 3.6,Macan Turbo,997GT2,930 turbo,i3, MINI JCW
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10-04-2011, 12:23 AM	#4
Richard@M-World 78 Rep 684 Posts Drives: NASA TTA #92 M3 Join Date: May 2011 Location: TX/IL iTrader: (0)	I would uninstall and retorque the shock top nut and the shock bottom bolt on the camber arm. Torque to: Top nut: 30 ft-lb Bottom bolt: 75 ft-lb GL! __________________ Authorized AiM Dealer - Solo/Solo DL \| SmartyCam HD \| www.m-world.us
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10-04-2011, 12:32 AM	#5
Falcon Keeper USAF/ Veteran/ F-16 Crew Chief 59 Rep 384 Posts Drives: 2018 Atlantis Blue Metallic M4 Join Date: Mar 2008 Location: Phoenix, AZ. iTrader: (0) Garage List 2012 BMW E92 M3 [0.00]	Cool, Thanks! I will try that out and see if that fixes the problem. Any more help or ideas are appreciated... __________________ - Greg Professional Table Flipper
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10-04-2011, 12:56 AM	#6
Krozi Colonel 167 Rep 2,736 Posts Drives: 2008 E92 ///M3 Alpine White Join Date: Oct 2009 Location: SoFla - Bonita Springs iTrader: (24)	Happened to me too. It's the top nut! __________________ 2008 E92 ///M3 Alpine White//Fox Red//6MT// Florida Bimmer - Join us on FaceBook!
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