Odd Suspension problem...

lemetier · 09-16-2016, 10:20 AM

Scratching my head on this one...

Left rear corner has dropped 25mm (32mm with the fuel topped off), added in a hefty amount of neg camber, cording a relatively new MPSS in less than 400 highway miles. Have not hit any potholes, debris, etc. Anyone seen something like this on their M5? Not looking forward to the dealer visit for this one.

combatbmw · 09-16-2016, 01:43 PM

Damn that sucks.
Check alignment.

lemetier · 09-16-2016, 03:03 PM

Quote:

Originally Posted by combatbmw

Damn that sucks.
Check alignment.

Something major definitely is wrong and I've never seen anything like this on a non air suspension. Car was aligned not long ago and I definitely have not hit anything. No scuffs, bubbles, or bends and the front seems normal and in spec. Just doing a rough measurement myself:

Ride Height (ground to center of wheel arch - 1/2 tank of fuel)

Left Rear: 661mm
Right Rear: 686mm

Camber:

Left Rear: -3.12'
Right Rear: -1.41'

With the tank full, there isn't much travel remaining to the bump stop. Very surprised there aren't any chassis faults.

momos750 · 09-16-2016, 03:53 PM

Has to be the alignment or a defective tire.

v3n0m · 09-16-2016, 04:19 PM

Could be spring failure.

boots · 09-18-2016, 05:14 PM

Yea it sucks donkey balls. My last set looked like that. Both sides. But it was due to bad alignment from BMW. Fucked off perfectly good tired. Had mine recently re alignment on a hunter machine. I also raised up my suspension a bit. So I'm hopi g not to ever see this again.

13M5F10 · 09-18-2016, 09:20 PM

Here is mine, tire is still 7/32. Lowered and shitty alignment. Got it corrected, hopefully doesn't happen again.

boots · 09-19-2016, 12:55 PM

I'm just glad I wasn't the only one who was pissed off

Hellrot Sachin · 09-19-2016, 09:09 PM

Quote:

Originally Posted by 13M5F10

Here is mine, tire is still 7/32. Lowered and shitty alignment. Got it corrected, hopefully doesn't happen again.

ouch, now that you have a good alignment, where do you go?

13M5F10 · 09-19-2016, 09:14 PM

Quote:

Originally Posted by Hellrot Sachin

Quote:

Originally Posted by 13M5F10

Here is mine, tire is still 7/32. Lowered and shitty alignment. Got it corrected, hopefully doesn't happen again.

ouch, now that you have a good alignment, where do you go?

I'm on DINAN suspension and they gave me the alignment specs to follow. The original installer didn't do it and gave me a bad alignment.

I just followed the DINAN spec sheet. Hoping that fixes it.

Spinny02 · 09-20-2016, 09:30 PM

I had the same from a bad alignment.

Hellrot Sachin · 10-02-2016, 11:15 AM

Quote:

Originally Posted by 13M5F10

I'm on DINAN suspension and they gave me the alignment specs to follow. The original installer didn't do it and gave me a bad alignment.

I just followed the DINAN spec sheet. Hoping that fixes it.

Can you recommend a good shop in the area that deals with lowered cars like ours?

13M5F10 · 10-02-2016, 12:12 PM

Autoscope Plano did mine, they are also an authorized DINAN shop.

I checked my rears yesterday, so far so good.

13M5F10 · 10-02-2016, 12:43 PM

Quote:

Originally Posted by Hellrot Sachin

Quote:

Originally Posted by 13M5F10

I'm on DINAN suspension and they gave me the alignment specs to follow. The original installer didn't do it and gave me a bad alignment.

I just followed the DINAN spec sheet. Hoping that fixes it.

Can you recommend a good shop in the area that deals with lowered cars like ours?

Also another recommendation is European Auto Service in uptown off Tracy

Wheel man · 10-19-2016, 02:36 PM

Classic BMW in Plano did my lowering & alignment 6000 miles ago and my tires are in good shape so far. They are also a Dinan dealer.

13M5F10 · 10-19-2016, 08:27 PM

Quote:

Originally Posted by Wheel man

Classic BMW in Plano did my lowering & alignment 6000 miles ago and my tires are in good shape so far. They are also a Dinan dealer.

Not my favorite shop ... they've f*cked up too many times on my M5. I guess it's hit or miss with dealers. I changed to BMW of Dallas. Great SA and the techs know their stuff.

lemetier · 10-19-2016, 09:46 PM

Quote:

Originally Posted by 13M5F10

Quote:

Originally Posted by Wheel man

Classic BMW in Plano did my lowering & alignment 6000 miles ago and my tires are in good shape so far. They are also a Dinan dealer.

Not my favorite shop ... they've f*cked up too many times on my M5. I guess it's hit or miss with dealers. I changed to BMW of Dallas. Great SA and the techs know their stuff.

Guaranteed to be hit or miss at a dealer and the tech. It's still unresolved until next week. I didn't discover it near home so it was a crap shoot to begin with using nearest dealer which is not close at all. No doubt the alignment is off by a huge amount as it should with the corner suddenly dropping so much with zero indications or fault codes, spring and damper appear fine, there isn't anything blatantly obvious with the links and arms, and absolutely nothing to keep an impact in the possibility. Rather get it to a better place and go through it with RSM, so best choice is get the tires on and have it aligned as much as it would go and run extra pressure to stop the sidewalk from compressing so much paid out of pocket

Still down too far and just under 3' neg camber and the only plausible thing left I can come up with for this particular combo is the mounting point on the body deforming.

lemetier · 10-19-2016, 11:12 PM

And for the latest surprise...the 95mi drive back to leave the car until next week ended with the right front howling. It didn't leave that way.

DaveCM5 · 11-23-2016, 02:20 PM

I would be my guess that the toe angle on that wheel is way off, very positive toe. The wheel is probably trying to pull out sideways when you drive causing the suspension to squat. One test you can do is to back up straight for a car length or two and see if it sits right or higher than normal. And after a forward car length it squats again. This would confirm it.

I suspect Either they didn't lock the jam nut on the tie tod, or control arm if there isnt a tie rod, or they didn't align it correctly.

Another thing is if you've had the spring replaced recently maybe they forgot to install the rubber bushing at the top...

09-16-2016, 10:20 AM	#1
lemetier Plenipotentiary 2614 Rep 3,046 Posts Drives: Yes Join Date: Jul 2010 Location: Location iTrader: (0)	Odd Suspension problem... Scratching my head on this one... Left rear corner has dropped 25mm (32mm with the fuel topped off), added in a hefty amount of neg camber, cording a relatively new MPSS in less than 400 highway miles. Have not hit any potholes, debris, etc. Anyone seen something like this on their M5? Not looking forward to the dealer visit for this one. Attached Images
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09-16-2016, 01:43 PM	#2
combatbmw Major 206 Rep 1,250 Posts Drives: 20' X3M CP Join Date: Oct 2013 Location: SoCal iTrader: (2) Garage List 2017 GMC Sierra All ... [0.00] 2015 BMW M5 [8.75]	Damn that sucks. Check alignment. __________________ 2020 X3M CP - IND Reflector set \| Ceramic Tint Retired:2015 M5 CP MSR Intake\|Carbon Fiber Fender Vents\|Meisterschaft GTC catback with LXR mid pipes and ER Catless DPs \| BPMSPORT Stage II Tune \| RKP Rear Diffuser and Challenge Center piece \|RKP Front Lip\| Painted Reflectors \| H&R Springs \| Strasse SM5R Carbon Fiber Wheels \| Nitto R888 \|
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09-16-2016, 03:53 PM	#4
momos750 Captain 143 Rep 715 Posts Drives: 2015 M5, 2011 750Li Join Date: Jul 2015 Location: CA iTrader: (0)	Has to be the alignment or a defective tire. __________________ 2015 M5 - Singapore Grey Metallic - Silverstone Full Merino Interior - Executive Pack - Drivers Assist Pack -Comp Pack -
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09-16-2016, 04:19 PM	#5
v3n0m Lieutenant 57 Rep 451 Posts Drives: 2013 MCB M5 Join Date: Apr 2013 Location: Vancouver, BC iTrader: (0)	Could be spring failure.
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09-18-2016, 05:14 PM	#6
boots Curve Thrasher 623 Rep 3,773 Posts Drives: 2013 Bmw m5..White/Blk. Join Date: Nov 2012 Location: Cypress Tx iTrader: (0)	Yea it sucks donkey balls. My last set looked like that. Both sides. But it was due to bad alignment from BMW. Fucked off perfectly good tired. Had mine recently re alignment on a hunter machine. I also raised up my suspension a bit. So I'm hopi g not to ever see this again.
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09-18-2016, 09:20 PM	#7
13M5F10 Hide! My wife's coming! 812 Rep 2,816 Posts Drives: 2013 BMW M5 \| MSR Stage 3 Join Date: Jun 2015 Location: Las Colinas, TX iTrader: (5)	Here is mine, tire is still 7/32. Lowered and shitty alignment. Got it corrected, hopefully doesn't happen again. Attached Images __________________ * SOLD * 2013 BMW M5 \| Space Grey \| MSR Stage 3 Tune \| Catless Downpipes \| MSR Intake and Charge Pipes \| MSR Exhaust (Prototype) \| Vorsteiner Rear Diffuser \| RW Carbon Front Lip \| RW Carbon Trunk Spoiler\| Vorsteiner VS-310 Forged Wheels \| Escort 9500CI w/Laser Jammers
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09-19-2016, 12:55 PM	#8
boots Curve Thrasher 623 Rep 3,773 Posts Drives: 2013 Bmw m5..White/Blk. Join Date: Nov 2012 Location: Cypress Tx iTrader: (0)	I'm just glad I wasn't the only one who was pissed off
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09-20-2016, 09:30 PM	#11
Spinny02 Lieutenant Colonel 124 Rep 1,840 Posts Drives: '14 M5 CP Dinan Stage 2 Join Date: Jun 2013 Location: Houston, Tx iTrader: (2) Garage List 2018 Escalade ESV P ... [0.00] 2014 M5 Dinan S1 [0.00]	I had the same from a bad alignment. __________________
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10-02-2016, 12:12 PM	#13
13M5F10 Hide! My wife's coming! 812 Rep 2,816 Posts Drives: 2013 BMW M5 \| MSR Stage 3 Join Date: Jun 2015 Location: Las Colinas, TX iTrader: (5)	Autoscope Plano did mine, they are also an authorized DINAN shop. I checked my rears yesterday, so far so good. __________________ * SOLD * 2013 BMW M5 \| Space Grey \| MSR Stage 3 Tune \| Catless Downpipes \| MSR Intake and Charge Pipes \| MSR Exhaust (Prototype) \| Vorsteiner Rear Diffuser \| RW Carbon Front Lip \| RW Carbon Trunk Spoiler\| Vorsteiner VS-310 Forged Wheels \| Escort 9500CI w/Laser Jammers
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10-19-2016, 02:36 PM	#15
Wheel man Private First Class 1226 Rep 195 Posts Drives: 2014 M6 GC Join Date: Feb 2016 Location: Dallas Texas iTrader: (0) Garage List 2022 BMW M850 [9.67] 2014 M6 Gran Coupe CP [9.55]	Classic BMW in Plano did my lowering & alignment 6000 miles ago and my tires are in good shape so far. They are also a Dinan dealer.
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10-19-2016, 11:12 PM	#18
lemetier Plenipotentiary 2614 Rep 3,046 Posts Drives: Yes Join Date: Jul 2010 Location: Location iTrader: (0)	And for the latest surprise...the 95mi drive back to leave the car until next week ended with the right front howling. It didn't leave that way. Attached Images
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11-23-2016, 02:20 PM	#19
DaveCM5 Second Lieutenant 85 Rep 252 Posts Drives: 2014 M5 Sapphire Black Join Date: Jun 2005 Location: Florida iTrader: (0)	I would be my guess that the toe angle on that wheel is way off, very positive toe. The wheel is probably trying to pull out sideways when you drive causing the suspension to squat. One test you can do is to back up straight for a car length or two and see if it sits right or higher than normal. And after a forward car length it squats again. This would confirm it. I suspect Either they didn't lock the jam nut on the tie tod, or control arm if there isnt a tie rod, or they didn't align it correctly. Another thing is if you've had the spring replaced recently maybe they forgot to install the rubber bushing at the top... Last edited by DaveCM5; 11-23-2016 at 02:25 PM..
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