You said: "One thing that I did notice is that the engine will often be much > hotter *after* I leave it off for a few minutes ..." This condition, known as "heat soak", is caused when the engine is stopped and engine temperatures increase because coolant is no longer transferring heat away form the engine block. This should not be of concern as long as upon re-starting the engine the cooling fans turn on and quickly bring the temperature down to normal. You also said: "One cause for this may be the asbestos heat shield". Negative; even a completely missing heatshield will have no effect on engine cooling. Finally concerning your vibration problem. Try taking your car to a facility that can do an "on the car spin balance" alignment procedure. Most chain operations like Pep Boys, Firestone, etc. are not equipped to perform this type of alignment. The "on the car spin balance" alignment procedure is much more precise than the off the car balance procedure. Not many alignment shops are equipped for this procedure. Look for a shop that specializes in performance or race car alignments. DMC Joe Memphis Updates: http://www.geocities.com/dmcjoe/home.html Tech Information, DMC Joe Help Club, & Store See You In Memphis!