Wheel Alignment Trouble
 

Hi Folks. I just came back from my local tire distributor. My box has been vibrating lately at high speed, so I took it in to be re-balanced and have the wheels aligned. Shop called me and said that 3 of the wheels lined up but the right rear was still 1/2 degree out after adjusting the eccentric as far as it would go.
any ideas as to what would cause this? And if so, any ideas on how to fix this?

It depends on which setting is out of spec.Hopefully the shop will give you the final spec
Alignment rarely causes vibration issues.
Your right rear wheel may be bent & the source of the vibration.
A good alignment shop familiar with Boxsters can advise you of the cure & cost.
What year is the Box & mileage?

Hi By. '99 Boxster, 87k. I drove the car. Handles a lot better than it did and the vibration is gone. They said a new eccentric is a start. I personally don't think that could be the issue.

OK, glad they solved the vibration. Eccentric bolts have a tough life so don't hesitate to get a new 1 ($30) & locking nut while you're at it. If the camber is out you can get 2 different design control arms to give more adjustment range.

Thanks for the info. Can the eccentric wear down over the course of 14 years?

The only way an eccentric could wear would be if it wasn't tightened down. If that was the case I 'd guess that the slots in the subframe would elongate. They could be welded- in and redrilled/ filed. I suspect your car has simply 'settled' to the point that it's outside the scope of the stock eccentrics, as they have little range of adjustment. The real question is it toe or camber that's out? Camber's not that big of a deal but toe can be. After lowering my car I had to buy adjustable toe bars for the rear. I went with Topspeed for $270. They seem to be of good quality and they're working good so far.

+1 on the Top Speed adjustable rear toe bars. I like mine too!

No. It's quite impossible for the eccentric plate and its bolt/but to wear out or break.

Again thanks for the input. I guess I'll have to get these toe bars if I want it back to spec. It is the toe that is a .5 degree too far in. I haven't looked at the setup yet myself because it rained all afternoon. I'll delve into this during the weekend and see if I can live with it like it is or start working on it.

The alignment is quite precised in an order of hundredth of inches, i.e. 0.01, for toe. I believe the camber is more forgiving and is read in tenth.

I took it up to 100 today and it's holding steady. I can live with it now for a while. Not pulling to the right anymore, and no vibration. Now if I could just stop getting P0154 and P0134 to go away I would have a happy boxster!