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Re: Wheel Balacning Problem (archive)

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Posted by Paul E on January 06, 2000 at 18:33:40:

In Reply to: Wheel Balacning Problem posted by Lou Starelli on January 06, 2000 at 17:15:26:

:
: I have a new 1999M3 that has had a front wheel balancing problem from day 1. There is a significant vibration in the steering wheel starting at 60 thru 100. After repeated attempts to balance the dealer replaced the original Dunlops with BF Gforce. This helped but didnt fix. He then replaced the Goodriches with Pilots. This helped more but still didnt fix. The vibration is some what less and now starts at 80 thru 100+ but is still there. The dealer drove and said this is normal. I dont think so and would like any input I can get on simular problems so I can go back and get it right.

: My next try is to have the wheels balanced at a nondealer shop that does on car balancing to see if this gets it and if so I'm going to assume its a rotor or hub problem. Any Thoughts on this idea??

Lou, what you are experiencing is what alot of us M3 owners have experienced...Its called 'tire flatspotting'.  When I drove my '99 home from the dealership, I almost took it right back...From 60 to 70, and lesser amounts at 80, there was a pronounced steering wheel vibration...But over the next few weeks, I noticed that it would come and go....And after a decent length drive, it would always disappear.  And on start up after parking for a while, it would usually start up again.  I had the dealer try and rebalance 3 times..They finally told me, after srvc mgr and salesman test drove up to 80 mph, that it feels like they all do.  I then took it to a local garage where I've had good luck with balancing.  He stripped all the wts off, and did what he called an 'Aluminum wheel fine balance', where the wts are only placed on the inside...after he zeroed out each wheel, he took it for a drive, and didnt notice anything.  On the way home I thought it was fixed also....But over the next few wks, I did detect the periodic vibration..But funny thing happened when the temperature dropped below 70.  It totally disappeared.  I then became totally convinced that it was a product of the pilot sports flat spotting.  No doubt about it...I now have Pirelli Winter 210s on there, and theres been no vibration at all.....I think you'll have to get used to it.  Its part of the territory.
_____________________________
Paul Elliott
'99 Alpine White M3; <8000 mi; Forged M dbl-spokes; Rotex pads; Dinan Stage II Supercharger


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