87 951 - New swaybar bushings - vibration

[Raulg]

Hello there,
I have a 1987 Turbo. I recently replaced the swaybar bushings and noticed that the steering is now vibrating at 60 mph.

It happened this morning on my drive to work.
I stopped on the side of the road to check the lugnuts and the tire pressure. They checked ok.

What may be the source of the vibration? it was fine before the bushings.
Do the swaybar links need re-tightening? Could I have installed the vertical center supports backwards?

Thank you for any advice you can provide.
Raul

[mytrplseven]

Re-check the fastening bolts/nuts. We're talking the rear swaybar, right? Did you loosen or remove anything else during this process?

[Raulg]

Hi there mytrplseven.
I am referring to the front swaybar bushings. The vibration is on the steering wheel.
I checked the bolts and the links at the control arms, they all appear to be tight.
I will check tires and wheels next. The tires are 3 to 4 years old and are "summer compound".
I wonder if dryrot is setting in and they are losing flxibility.
Thank you for your help
RG

[kdjones2000]

How old are your caster blocks? Vibration was reduced once I replaced those.

Replacing your sway bar bushings may have increased the linkage from left to right, which may be causing more steering wheel vibration.

Your control arm bushings may also be worn, which can cause vibrations.

[cfassett]

3-4 year old tires shouldn't be dry rotted to the point that they're falling apart and causing a vibration. If they're that bad, you would expect to see visual cracking on the sidewall or between the treads. Losing a wheel weight would cause this though.

I'd echo the others and say check the front suspension. Lift the front and give the wheels a shake test top to bottom and left to right, and see if anything is loose. Definitely go back and recheck your work, and especially the torque on your lug nuts.

Also, did you go back with rubber bushings, or to some sort of urethane?

[nize]

re-balance the wheel+tire.