Thank You to all who helped with my urgent plea for advice. 
 
The cork stayed in the coolant sensor hole all the = way to California and now my Syncro sits in front of my house.  I will = inspect it tomorrow since it is raining here in Pomona. 
 
I am so grateful to this list and the terrific = people on it!
 
Loretta
87 Syncro (w/ cork mod.)
90 GL (stock)