[TR] Upper Control Arm bushing torque

[Randall]

> The tightness was at the upper
> control arm bushings - they were very tight.

Brian:

There is something wrong with this picture.  Those upper bushings are
supposed to be fairly soft rubber, and the nut/washer is supposed to pull
down against a shoulder, thereby limiting the force applied to the rubber.
There should be no way to pull that joint up tight enough to lift the car as
you've described, unless some of the parts are wrong or badly damaged.

> I understand the assembly
> procedure is to let the car down on its wheels before fully tightening the
> slotted nuts to compress the bushings. What torque must I then tighten the
> nuts to? Is it a tighten, then back-off-a-flat process?

I don't have a TR4 manual handy, but it should be the same as the TR3.  The
TR3 book gives 26-40 ft-lb, "to suit pin hole".  No need to back off, unless
you've overshot the hole.

Of course, if you're installing polyurethane or Nylatron bushings, the
procedure may change.

Randall