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Re: Rear (or "seat of your pants") shimmy. I searc (archive)

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by Joe Ording on September 26, 2001 at 16:14:17:

In Reply to: Rear (or "seat of your pants") shimmy. I searched posted by Eric on September 26, 2001 at 15:56:02:

Well, wheel balance is always suspect number one, but since you had them balanced on a Hunter 9700 (assuming the tire monkey knew how to use it), I guess we can eliminate that as a cause. Next would be improperly torqued wheel lugs, are you blasting them on with an impact wrench? I believe 70-80lb is the prefered torque range. Making sure they're consistent is important. Warped rotors could introduce some shimmy, also.

I still think the problem is most likely in the wheels/tires, however. Either a tire that's out of balance, out of round, or a bent wheel. Are these the stock wheels? If not, do your wheels require hubcentric spacers? If so, check their condition, as plastic ones can break.

the archives, and was having a hard time finding some of the older threads that addressed this issue (I know they're out there!) Here's what I have and what's been done. '93 525iM @ 76K. Had "the shimmy." Hunter 9700 balanced all four, still there, so went ahead and did the front upper control arms (complete arms w/ 750 bushings.) Still there- but no feel in the wheel! Aha- so it's in the rear. Pronounced shimmy at 60, no feel in the wheel, but in the seat of the pants. Can actually see arm rests shaking about. Rear rotors? Braking does not seem to affect it, nor does it exacerbate if I just pull up the emergency brake (trying to just engage/annoy the rear rotors.) Still no noticeable difference. My shop did the old "I don't see anything wrong." Any ideas as to which components I should double check?

I've gotta leave now (on work machine) but will check this in the a.m.. THANKS in advance to all! You guys have really helped me with my education, purchase, and diagnosis, of my e34!


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