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Suspension & Braking Forum by BimmerWorld
Have some questions about suspension or brake setups for your E46 BMW? Get all your answers here!
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Old 04-15-2013, 03:14 AM   #1
itscoo2pyopants
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Steering wheel vibration

I've been getting a vibration at freeway speeds 70+. It is very slight and not all the time. Wheels are balanced with no bends. Front suspension recently replaced; st coils, front control arms, powerflex Fcab, end links, powerflex rtab 30k miles ago. Not sure where to start, I've tried multiple sets of wheels, spacers on / off. Around the city I don't have any vibration, but as soon as I get up to freeway speeds the steering wheels starts to shake.

Any ideas?
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Old 04-18-2013, 05:25 PM   #2
318ise
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welcome to the steering vibro club http://forum.e46fanatics.com/showthread.php?t=979116
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Old 04-18-2013, 06:34 PM   #3
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Usually caused by bad wheel balance. Rotate wheels front to back to isolate.
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Old 04-18-2013, 07:53 PM   #4
TerraPhantm
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Could be the FCABs. I remember my ZHP always had steering vibrations at highway speeds until I switched back to OEM FCABs. I would also look at the control arms themselves depending on your mileage.

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Old 04-19-2013, 01:30 AM   #5
itscoo2pyopants
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I was thinking getting OEM Fcab as well as steering couple. The problem started after I mounted some wheels that were off balance. After getting them balanced the vibration improved but was still there. Since then I've had 2 sets of wheels (OEM 19's that I've never had problems with and a set of jlines) and the vibration is still there.
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Old 04-19-2013, 02:42 AM   #6
ryannel2003
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I have an entire new suspension. Struts, Meyle control arms and bushings, end links, etc. New tires, alignment, fully aligned. Steering guibo. Tie rods. You name it... it's been done. Above 60MPH I have the shakes come and go. They aren't horrible but they are there. Only things left would be steering rack and or wheel hubs. Gonna live with it until my next wheel balance and see if that does anything.
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Old 04-19-2013, 08:34 AM   #7
cposk
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I've read that the Powerflex FCAB 2 piece design can cause this. Basically the inner piece slips up the control arm a little bit and isn't sitting tight in the outer piece.
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Old 04-19-2013, 02:45 PM   #8
Dave1027
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Quote:
Originally Posted by itscoo2pyopants View Post
I was thinking getting OEM Fcab as well as steering couple. The problem started after I mounted some wheels that were off balance. After getting them balanced the vibration improved but was still there. Since then I've had 2 sets of wheels (OEM 19's that I've never had problems with and a set of jlines) and the vibration is still there.
Probably still not balanced. I've been down this road with tire shops before. Once a shop gave up and replaced the tires. Turned out the tires were out of round and would not balance no matter how many times they tried.
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Old 04-21-2013, 04:29 PM   #9
tommytoyz
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Out of round tires or ones with a flat spot will do this, even perfectly balanced. Some even develop temporary flat spots after sitting for a while and go away after a number of miles.

My Goodyear tires are crap and are wearing uneven like this.

Other issues can be worn wheel bearings and even brake rotors out of balance. Replace front bearings and front brake rotors, if everything else is new.
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