I'd for sure put antiseize on the threads. Dennis At 04:02 PM 7/15/2005, Cliff Tibbitts wrote: >Quick Question: > >I am not new to Corvairs, but this is my first 140 engine. Does the >thermister go into the head try, or does it need to be coated with some type >of thermal grease? > >Any help appreciated, thanks. > >Cliff