Help idenifying a noise

Stellaris · Thu, Dec-02-2010, 08:41:37 PM

I was backing out of my driveway and heard a loud snap as I went down the curb, I though my car had just bottomed out. I got out and checked under and noticed the bottom strut bolt on rear left rear had snapped and my strut was just hanging there. I went and got a new bolt and put it back on but I still have a hollow knocking sometimes at slow speeds and bumps. Any idea what else this could be?

bolestuff · Thu, Dec-02-2010, 08:47:51 PM

Rear Shock Mount?

laxplaya21 · Thu, Dec-02-2010, 08:50:53 PM

Quote:

Originally Posted by bolestuff

Rear Shock Mount?

Sounds like it could be!

Pull the carpet out of the way in the trunk and check to see if there is any movement in the shock... then make sure everything is torqued up.

Stellaris · Thu, Dec-02-2010, 09:24:02 PM

Was just ripping that apart as we speak I got it off and everything looks to be ok. Should or should that actual mount look different if it was messed up?

bolestuff · Thu, Dec-02-2010, 10:29:12 PM

Put the car on a jack stand, put the jack under the tire, center carefully, put just enough pressure on the wheel to move the tire up from resting. Grab a hold of the tire on both sides, then to and bottom and see if you can feel play. Have an assistant watch the RSM as you manipulate the wheel. If that sucker moves at all I would replace it.

Good luck

Stellaris · Thu, Dec-02-2010, 10:33:05 PM

I went through and did that it didnt move after I took it all out and tightened it back down. Went for a drive to see if it was fixed and after about 1 lap around the block, it started back up. What could be the next thing to check. RTAB or possibly a broken spring? I have KW v2's so I dont know how likely that would be

laxplaya21 · Fri, Dec-03-2010, 01:53:22 AM

Did you change out the RTAB's? Because if you don't lube the shiiiit out of those things then they can definitely act up. They make sort of a banging noise though. How about your subframe? A failure somewhere in the rear subframe could me making some interesting noises as well.

Stellaris · Fri, Dec-03-2010, 02:13:45 AM

No I ordered RTAB's and FCAB's today so I will be replacing all those next week. I made my gf ride in the back seat with the back left seat down and listen and she said its coming from "under the trunk" then she said it sounds like its above my tire, so I ordered some new shock mounts as well. Hopefully 1 of those 2 will fix it, and its no my subframe.

Stellaris · Fri, Dec-03-2010, 05:58:34 PM

I'm at my Indy shop and they can't find the sound at all they drove it without the rear strut and it still made the noise, then they checked the subframe and nothing was wrong. Does anyone else have any possible idea of what could be making a noise like this in the rear? It sometimes feels as if the axle is about to fall out.

bolestuff · Fri, Dec-03-2010, 09:02:43 PM

Sway bar end link? And make sure your lug nuts are all torqued down. Also check to make sure that the area where the bolt snapped it not damaged.

Thu, Dec-02-2010, 08:41:37 PM	#1
Stellaris Registered User Join Date: Aug 2009 Age: 27 Posts: 555 In the garage: '04 BMW M3 Reputation: 0 Location: Redondo Beach, CA	Help idenifying a noise I was backing out of my driveway and heard a loud snap as I went down the curb, I though my car had just bottomed out. I got out and checked under and noticed the bottom strut bolt on rear left rear had snapped and my strut was just hanging there. I went and got a new bolt and put it back on but I still have a hollow knocking sometimes at slow speeds and bumps. Any idea what else this could be? __________________ 2004 Jet Black M3 6MT Linea Corse LM // KWv2 // CSL Bumper // CSL Diffuser // CSL Center Console // Depo Smoke Corners // JL Audio // Kenwood // Orion V2 Angel Eyes // Macht Schnell Spacers Headers // Toyo T1R // AFE Stage 1 // Supersprint Race // Powerflex // 1x1 CF Interior Trim

Thu, Dec-02-2010, 08:47:51 PM	#2
bolestuff Registered User Join Date: Mar 2010 Posts: 468 In the garage: '91 TOYOTA SR-5 '99 HONDA VFR 800 '89 BMW 325iX '03 BMW M3 Reputation: 0 Location: Portland	Rear Shock Mount? __________________ Carbon Black on IR = Hotness!

Thu, Dec-02-2010, 09:24:02 PM	#4
Stellaris Registered User Join Date: Aug 2009 Age: 27 Posts: 555 In the garage: '04 BMW M3 Reputation: 0 Location: Redondo Beach, CA	Was just ripping that apart as we speak I got it off and everything looks to be ok. Should or should that actual mount look different if it was messed up? __________________ 2004 Jet Black M3 6MT Linea Corse LM // KWv2 // CSL Bumper // CSL Diffuser // CSL Center Console // Depo Smoke Corners // JL Audio // Kenwood // Orion V2 Angel Eyes // Macht Schnell Spacers Headers // Toyo T1R // AFE Stage 1 // Supersprint Race // Powerflex // 1x1 CF Interior Trim

Thu, Dec-02-2010, 10:29:12 PM	#5
bolestuff Registered User Join Date: Mar 2010 Posts: 468 In the garage: '91 TOYOTA SR-5 '99 HONDA VFR 800 '89 BMW 325iX '03 BMW M3 Reputation: 0 Location: Portland	Put the car on a jack stand, put the jack under the tire, center carefully, put just enough pressure on the wheel to move the tire up from resting. Grab a hold of the tire on both sides, then to and bottom and see if you can feel play. Have an assistant watch the RSM as you manipulate the wheel. If that sucker moves at all I would replace it. Good luck __________________ Carbon Black on IR = Hotness!

Thu, Dec-02-2010, 10:33:05 PM	#6
Stellaris Registered User Join Date: Aug 2009 Age: 27 Posts: 555 In the garage: '04 BMW M3 Reputation: 0 Location: Redondo Beach, CA	I went through and did that it didnt move after I took it all out and tightened it back down. Went for a drive to see if it was fixed and after about 1 lap around the block, it started back up. What could be the next thing to check. RTAB or possibly a broken spring? I have KW v2's so I dont know how likely that would be __________________ 2004 Jet Black M3 6MT Linea Corse LM // KWv2 // CSL Bumper // CSL Diffuser // CSL Center Console // Depo Smoke Corners // JL Audio // Kenwood // Orion V2 Angel Eyes // Macht Schnell Spacers Headers // Toyo T1R // AFE Stage 1 // Supersprint Race // Powerflex // 1x1 CF Interior Trim

Fri, Dec-03-2010, 01:53:22 AM	#7
laxplaya21 Registered User Join Date: Sep 2004 Age: 32 Posts: 1,551 In the garage: '09 FORD F-250 Reputation: 0 Location: Long Island/NY	Did you change out the RTAB's? Because if you don't lube the shiiiit out of those things then they can definitely act up. They make sort of a banging noise though. How about your subframe? A failure somewhere in the rear subframe could me making some interesting noises as well. __________________ 2004 Silver Grey ///M3 Coupe, SMG\|Active Auto Stage 1.5 Supercharger 451RWHP\|Agency Power Headers\|200 Cell Race Cats welded into Sect 1, Eisenmann Sect 2 non resonated, Active Auto Muffler\|19" LC818's Hyper Black, Toyo T1R\|TCK S/A Coilovers w/ Camber Plates\|Powerflex RTAB's\|CSL Trunklid & Diffuser\| ///M Embroided Headrest\|M5/6 Illuminated Shift Knob\|5000K HID Fogs, Stock D2S, 6000K Halos\|

Fri, Dec-03-2010, 02:13:45 AM	#8
Stellaris Registered User Join Date: Aug 2009 Age: 27 Posts: 555 In the garage: '04 BMW M3 Reputation: 0 Location: Redondo Beach, CA	No I ordered RTAB's and FCAB's today so I will be replacing all those next week. I made my gf ride in the back seat with the back left seat down and listen and she said its coming from "under the trunk" then she said it sounds like its above my tire, so I ordered some new shock mounts as well. Hopefully 1 of those 2 will fix it, and its no my subframe. __________________ 2004 Jet Black M3 6MT Linea Corse LM // KWv2 // CSL Bumper // CSL Diffuser // CSL Center Console // Depo Smoke Corners // JL Audio // Kenwood // Orion V2 Angel Eyes // Macht Schnell Spacers Headers // Toyo T1R // AFE Stage 1 // Supersprint Race // Powerflex // 1x1 CF Interior Trim

Fri, Dec-03-2010, 05:58:34 PM	#9
Stellaris Registered User Join Date: Aug 2009 Age: 27 Posts: 555 In the garage: '04 BMW M3 Reputation: 0 Location: Redondo Beach, CA	I'm at my Indy shop and they can't find the sound at all they drove it without the rear strut and it still made the noise, then they checked the subframe and nothing was wrong. Does anyone else have any possible idea of what could be making a noise like this in the rear? It sometimes feels as if the axle is about to fall out. __________________ 2004 Jet Black M3 6MT Linea Corse LM // KWv2 // CSL Bumper // CSL Diffuser // CSL Center Console // Depo Smoke Corners // JL Audio // Kenwood // Orion V2 Angel Eyes // Macht Schnell Spacers Headers // Toyo T1R // AFE Stage 1 // Supersprint Race // Powerflex // 1x1 CF Interior Trim

Fri, Dec-03-2010, 09:02:43 PM	#10
bolestuff Registered User Join Date: Mar 2010 Posts: 468 In the garage: '91 TOYOTA SR-5 '99 HONDA VFR 800 '89 BMW 325iX '03 BMW M3 Reputation: 0 Location: Portland	Sway bar end link? And make sure your lug nuts are all torqued down. Also check to make sure that the area where the bolt snapped it not damaged. __________________ Carbon Black on IR = Hotness! Last edited by bolestuff; Fri, Dec-03-2010 at 09:04:26 PM. Reason: added content

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