Handling "loose" after fitted Prolines. Alignment? - BMW 3-Series (E90 E92) Forum

TomSx · 05-13-2013, 04:21 AM

Hello chaps

On the weekend I fitted some Eibach Prolines to my car. 90% of the time the improvement is massive however now over rough roads or say going over a cat eye the rear feels "wobbly" is the only way to describe it. Now when we fitted them I inspected all bushes etc which looked good. Everythings done up and fitted as it should be so I am guessing it will because the alignment is now out?

I am also very pleased with how it looks -

doughboy · 05-13-2013, 04:42 AM

Did you undo any of the rear inboard-end suspension arm bolts to fit the springs?

These are eccentric adjusters, if so did you mark their position and put them back in the same place?

I suggest a proper 4 wheel alignment is needed for sure.

TomSx · 05-13-2013, 04:47 AM

Yes we did. We put them back on the witness marks but i suspect it may be out? I cant think what else it would be?

doughboy · 05-13-2013, 06:31 AM

It doesn't take much though.

As the angles are designed to change as the car compresses in bumps and turns, as its sitting lower the geometry will be in the part 'compressed' state, so it needs resetting at the new static ride height.

A_P · 05-13-2013, 07:11 AM

Yep what he said. Get your alignment checked. Also what condition are you dampers in? Lowering spring will will further expose weak dampers.

romanbmws · 05-13-2013, 07:42 AM

Quote:

Originally Posted by A_P

Yep what he said. Get your alignment checked. Also what condition are you dampers in? Lowering spring will will further expose weak dampers.

Looks like his car is se ,any lowering springs need shorter dampers tbh.
and 4 wheel alignment when they settle.

TomSx · 05-13-2013, 07:51 AM

Yes it was a SE. The shocks are standard but looked in great condition with no sign of leaking. They looked new tbh.

I'm going to get the alignment done. I'm taking it to a make who can check it later and got it booked in for a pro alignment on Saturday.

Its got to be related to something I've done as its only just started happening with the springs fitted. All bushes look fine etc.

90% of the time its fine. It just skips on bumps time to time.

romanbmws · 05-13-2013, 08:11 AM

let car settle on springs and go do alignment, I know some people used shorter bump stops(m3 e36/ z4 ones) and it worked better but I still say se shocks are not designed for lowering springs. Have fun and good luck.

TomSx · 05-13-2013, 08:21 AM

Will do. The fronts are spot on. It's just this rear issue. I have rubber "dust" on my back bumper so i'm guessing ive found my problem..lol

TomSx · 05-13-2013, 12:08 PM

Well I've just had my alignment checked and....it was miles out. All sorted and very happy now. Thanks for everyone's inputs.

05-13-2013, 04:21 AM	#1
TomSx New Member Drives: 320d Join Date: Mar 2013 Location: Bristol Posts: 27 iTrader: (0)	Handling "loose" after fitted Prolines. Alignment? Hello chaps On the weekend I fitted some Eibach Prolines to my car. 90% of the time the improvement is massive however now over rough roads or say going over a cat eye the rear feels "wobbly" is the only way to describe it. Now when we fitted them I inspected all bushes etc which looked good. Everythings done up and fitted as it should be so I am guessing it will because the alignment is now out? I am also very pleased with how it looks -
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05-13-2013, 04:42 AM	#2
doughboy Major General Drives: E91 335i LCI Manual Join Date: Jan 2009 Location: UK Posts: 5,747 iTrader: (2) Garage List 2009 335i Tourer E91N [5.00]	Did you undo any of the rear inboard-end suspension arm bolts to fit the springs? These are eccentric adjusters, if so did you mark their position and put them back in the same place? I suggest a proper 4 wheel alignment is needed for sure. __________________ JB4 15ohm - QUAIFE LSD - BIRDS B3 SUSPENSION - HARTGE ARBS - ETS FMIC - ER CHARGE PIPE - FORGE DVs- M3 FRONT ARMS & REAR SUBFRAME BUSHES - M3 STRUT BRACE - AR OCC - AFE DCI - BMWP SSK - RPI SCOOPS

05-13-2013, 06:31 AM	#4
doughboy Major General Drives: E91 335i LCI Manual Join Date: Jan 2009 Location: UK Posts: 5,747 iTrader: (2) Garage List 2009 335i Tourer E91N [5.00]	It doesn't take much though. As the angles are designed to change as the car compresses in bumps and turns, as its sitting lower the geometry will be in the part 'compressed' state, so it needs resetting at the new static ride height. __________________ JB4 15ohm - QUAIFE LSD - BIRDS B3 SUSPENSION - HARTGE ARBS - ETS FMIC - ER CHARGE PIPE - FORGE DVs- M3 FRONT ARMS & REAR SUBFRAME BUSHES - M3 STRUT BRACE - AR OCC - AFE DCI - BMWP SSK - RPI SCOOPS

05-13-2013, 08:11 AM	#8
romanbmws Private First Class Drives: E90 325i m-sport Join Date: Jun 2012 Location: SHERWOOD FOREST Posts: 163 iTrader: (0)	let car settle on springs and go do alignment, I know some people used shorter bump stops(m3 e36/ z4 ones) and it worked better but I still say se shocks are not designed for lowering springs. Have fun and good luck. __________________ CURRENT : E90 325I 2006 SALOON M-SPORT PREVIOUS: E46 318I TOURING 2002 ,E36 325I SALOON 1995 , E34 535I SALOON 1991

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05-13-2013, 04:47 AM	#3
TomSx New Member Drives: 320d Join Date: Mar 2013 Location: Bristol Posts: 27 iTrader: (0)	Yes we did. We put them back on the witness marks but i suspect it may be out? I cant think what else it would be?

05-13-2013, 07:11 AM	#5
A_P Lieutenant Colonel Drives: E46 M3 Join Date: Mar 2012 Location: South East Posts: 1,697 iTrader: (0)	Yep what he said. Get your alignment checked. Also what condition are you dampers in? Lowering spring will will further expose weak dampers.

05-13-2013, 07:51 AM	#7
TomSx New Member Drives: 320d Join Date: Mar 2013 Location: Bristol Posts: 27 iTrader: (0)	Yes it was a SE. The shocks are standard but looked in great condition with no sign of leaking. They looked new tbh. I'm going to get the alignment done. I'm taking it to a make who can check it later and got it booked in for a pro alignment on Saturday. Its got to be related to something I've done as its only just started happening with the springs fitted. All bushes look fine etc. 90% of the time its fine. It just skips on bumps time to time.

05-13-2013, 08:21 AM	#9
TomSx New Member Drives: 320d Join Date: Mar 2013 Location: Bristol Posts: 27 iTrader: (0)	Will do. The fronts are spot on. It's just this rear issue. I have rubber "dust" on my back bumper so i'm guessing ive found my problem..lol

05-13-2013, 12:08 PM	#10
TomSx New Member Drives: 320d Join Date: Mar 2013 Location: Bristol Posts: 27 iTrader: (0)	Well I've just had my alignment checked and....it was miles out. All sorted and very happy now. Thanks for everyone's inputs.