91 ranger 4.0 ohv
I removed the water temperature sender (1 wire sender) and the Engine coolant temperature sender (2 wire plug) from the lower intake manifold to clean the manifold while I am doing a valve job. What kind of sealant should I use on the threads while replacing them. I know for the one wire sender it reads the variable ground between the threads of the sender and the one wire. The two wire sender I am not sure if the threads need to be grounded. I am thinking the sealant needs to be able to be conductive as well as seal well and high temperature. I thought of using teflon tape or paste or permatex high temp thread sealant but does not seem like it is conductive. Anyone know what to use.

I have a Ford manual and this is what it reads:
Use D8AZ-19554-A (esg-m4g 194-a, esr-m18p7-a)
Pipe sealant with teflon or equivalent or small amount of electrically conductive sealer.

 

Leave the lower threads bare and use your choice of sealant on the upper threads.
If you were to buy a new one, of either, that is what you would see, bare at the bottom sealer at the top