[W126 Coupe] Wheel Shimmy Driving Me Crazy!

[Jonathan]

You should come out this way as my tyre guy does on the car balancing, 
ie, each one is spun up to about 80-90- mph while on a lift...makes for 
a Smooth ride!

Have you looked closely @ the lower and upper control arm bushings?

Jonathan
plustech at optonline.net wrote:

> I'm not sure about the damper. I believe I replaced it on the 380, but 

> not the 560. I have replaced the drive shaft carrier bearing & mount 

> and flex discs - I know what that feels like - but that's gone. I know 

> it sounds goofy how many parts I have replaced. But I got a good deal 

> on the car. I bought it in 2003 with 85K miles for $4800. The body, 

> engine and tranny were in excellent shape, but I don't know how the 

> previous owner managed to destroy most of the suspension/drive 

> shaft related component. Either very bad steets or got it airborne a 

> few times? So I did not mind spending the money. I plan on getting my 

> 200K mark: at 155K now and still runs perfect - daily driver that has 

> never let me down, and I take care of it well, but it's this last 

> thing that I can't seem to figure out.

>  

> The next crazy thing I'm contemplating is lifting the car one wheel at 

> a time - find a way to rotate the wheel up to the 60 mph RPM to 

> hopefully find something. That's why I was asking about the on-car 

> tire balancing ... but I'll check the paperwork for the damper first.

>  

> Thanks for the tip!

>

> ----- Original Message -----

> From: Mister McGoo

> Date: Wednesday, November 7, 2007 11:49 pm

> Subject: Re: [W126 Coupe] Wheel Shimmy Driving Me Crazy!

> To: Mercedes Coupes Mailing Lists

>

> >

> > So you have replaced everything at least once! Yikes. You

> > neglected to mention the steering damper, which I'm sure you

> > likely have replaced three or four times, yes? Your problem

> > sounds frustrating.

> >

> > A couple of [perhaps] unrelated things: I had a 300D (W124 - 6

> > cyl, not 5) on which renewing the motor mounts solved a very

> > slight "steering shimmy" through a speed range around 30 -

> > 35mph. It seems that the motor tended to do a little jig

> > through that rpm range, as the mounts had obviously gone south

> > months before. However, I have never heard of this with a V8.

> >

> > Or, is it possible that your "shimmy" is not in the steering at

> > all, but (for instance) is a driveshaft problem causing the

> > entire body to vibrate so very slightly that you feel it through

> > the steering wheel? The steering box is hard-bolted to the

> > "chassis". I'm thinking of your statement that the vibration

> > appears to coincide with a specific rotational speed.

> >

> > (If we keep this up, you'll have a brand new SEC built totally

> > from some happy person's parts department!)

> >

> > -Bellamy

> >

> >

> > Date: Wed, 7 Nov 2007 22:53:15 -0500From:

> > plustech at optonline.netTo: mbcoupes at mbcoupes.comSubject: Re:

> > [W126 Coupe] Wheel Shimmy Driving Me Crazy!

> >

> >

> >

> >

> > Yes, I have replaced the bearings. The play (swivel) is very

> > little, approx 1/8” at the wheel edge, and it takes a fair

> > amount of force. I see the steering idler arm moving slightly up

> > & down at the ball joint end – that is what I think the problem

> > is, but no matter how much I tighten the assembly, it always has

> > some play. I’ll check the bearings again though. Thanks.

> >

> > _________________________________________________________________

> > Send a smile, make someone laugh, have some fun! Start now!

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