Changing Temperature sensor; should I use

[1996Z15]

teflon tape on the sensor threads, some other sealant or nothing at all?

 

[JohnZ]

I use a film of anti-seize so the sender can be removed later without extreme measures. Pipe threads are razor-sharp and seal by interference.

 

[petes74ttop]

Nothing at all or anti seize, because the heat from the water changes the resistance in the sender which makes the temp guage work. PG.

 

[Hib Halverson]

I use a film of anti-seize so the sender can be removed later without extreme measures. Pipe threads are razor-sharp and seal by interference.

Actually a pipe thread is tapered and that's why it seals. The threads themselves are no more sharp than any other thread that's cut with a die.

Also, follow the earlier-posted advice about dry or w. antiseize. Don't use teflon tape as if there's enough, it can act as an insulator or resistance.