Thanks Michael. Good points. I have been '928' educated beyond my imagination. I am also concerned with the wiring as I've been able to "pull" insulation off wiring without much trouble. I do believe though that the water level in the tank was low. I had noticed fluid on the floor of my garage after running the engine for quite a while. The fluid appeared to be clear, and I took a slight taste of it. It was sweet, which is a good indicator of antifreeze. So when Niels suggested low coolant level, I wasn't to surprised, just embarrassed.
Once I get the TB/WP changed out, I have brake pads, wiring, etc. on the to do list.
Thanks again,
Mike