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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 05-28-2015
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Join Date: Feb 2014
Location: nederland, co
Posts: 21
thread sealer for water temperature sender

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.
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Old 05-29-2015
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Join Date: Jan 2014
Location: Vancouver, BC
Posts: 7,577
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
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