Coilovers settled unevenly in rear?

tomng2012 · 12-03-2019, 08:12 AM

So I recently purchased BC Racing BR series coilovers and installed them myself... all looked well after the install. But after about 100 miles of driving, the rear springs settled (expected). The surprising part is the rear-right settled much more than the left. I can’t fit a finger between the tire/fender. But The left side has a little more than a finger of wiggle room.

I’d also like to note that I have the adjustable spring perch set to MAX HIGH.

Two questions:
1. What could be the cause of the rear being uneven?
2. Is the rear supposed to be this low at max height? (I did not buy the extreme low kit)

Will post photos when I get a chance.

cfm56d7b · 12-05-2019, 01:48 PM

Manufacturing quality control is the likely reason. Rear right and left components should have been inspected much closer.

Please post photos when you can.

Logicoeur · 12-05-2019, 02:39 PM

Did you leave or remove the oe spring pads before installing the new BC adjuster and spring?

Athomas · 12-05-2019, 03:33 PM

I ran into a similar issue when installing KW V1s on my F31. The rear adjustable springs were set 0.25" apart and ride height was almost even, but still off. I took it apart and reinstalled 6 times before giving up and letting the alignment shop figure it out. They were able to get the height right, saying it was due to camber adjustment / other alignment issue. Explanation made no sense to me, but it's even now. This was my 3rd suspension DIY on a BMW, first time I have run into this issue. I'm still puzzled.

Also worth considering front adjustments affecting the rears, particularly if you only adjust one of the fronts rather than both - think about getting a tripod level.

12-03-2019, 08:12 AM	#1
tomng2012 New Member 1 Rep 11 Posts Drives: 2016 BMW 328i xDrive Join Date: Jun 2019 Location: Columbus, OH iTrader: (0)	Coilovers settled unevenly in rear? So I recently purchased BC Racing BR series coilovers and installed them myself... all looked well after the install. But after about 100 miles of driving, the rear springs settled (expected). The surprising part is the rear-right settled much more than the left. I can’t fit a finger between the tire/fender. But The left side has a little more than a finger of wiggle room. I’d also like to note that I have the adjustable spring perch set to MAX HIGH. Two questions: 1. What could be the cause of the rear being uneven? 2. Is the rear supposed to be this low at max height? (I did not buy the extreme low kit) Will post photos when I get a chance.
	Appreciate 0 Tweet Quote

12-05-2019, 01:48 PM	#2
cfm56d7b Lieutenant General 5886 Rep 10,256 Posts Drives: 2017 440i Gran Coupe & 2015 X5 Join Date: Nov 2012 Location: Orange County, CA iTrader: (2)	Manufacturing quality control is the likely reason. Rear right and left components should have been inspected much closer. Please post photos when you can.
	Appreciate 0 Quote

12-05-2019, 02:39 PM	#3
Logicoeur Lieutenant Colonel 993 Rep 1,934 Posts Drives: F30 335i xDrive Join Date: Feb 2018 Location: Boston iTrader: (0)	Did you leave or remove the oe spring pads before installing the new BC adjuster and spring? __________________ F30 335iX \| Remus Axleback \| Fabspeed Catted DP \| VRSF Comp IC \| 18X9 ET35 19lb MT1 \| 255/40/18 ECS \| Ohlins RT Millway Street \| Millway Control Arm Bushings \| Turner Endlinks \| TMH 75mm 14x1.5 Studs \| BMW MPerf LSD \| XDelete \| Pipercross Filter \| MHD Stg2 93
	Appreciate 0 Quote

12-05-2019, 03:33 PM	#4
Athomas New Member 1 Rep 5 Posts Drives: 2017 330i wagon Join Date: Dec 2015 Location: Houston iTrader: (0)	I ran into a similar issue when installing KW V1s on my F31. The rear adjustable springs were set 0.25" apart and ride height was almost even, but still off. I took it apart and reinstalled 6 times before giving up and letting the alignment shop figure it out. They were able to get the height right, saying it was due to camber adjustment / other alignment issue. Explanation made no sense to me, but it's even now. This was my 3rd suspension DIY on a BMW, first time I have run into this issue. I'm still puzzled. Also worth considering front adjustments affecting the rears, particularly if you only adjust one of the fronts rather than both - think about getting a tripod level.
	Appreciate 0 Quote