Re: Tracking out, fixed and out again
I'm not familiar with the 166, but I had a similar (though not so dramatic) event on my old 164. That turned out to be track rod ends. As I say, I don't know how similar the 166 is to the 164 but the 164 track rod ends are a ball joint and they have a spring inside them to keep the ball pushed into its socket. As they wear, the spring makes it hard to feel the play by hand - especially if you jack the car up and let the wheels hang, because then, the ball is rotated to a part of the socket that it doesn't normally bear against so you don't notice the play. The only way is really with a ramp or pit and get someone to rock the steering VERY slightly from side to side with the car's weight on its wheels while you fell the ball joint with your hand to see if it moves. They're pretty easy to change but you'll need to get the tracking re-done once you've changed them.