There are two coolant temp sensors. One to tell the computer that your engine
is hot or cold and adjust the idle mix accordingly. The other feeds the
instrument panel and the radiator fan. They are both in the thermostat
housing. Make sure you replace the right one. Do it quick and you won't lose
too much coolant. There was a thread on this operation a few weeks ago. Check
the archives. Yours may have an O ring to replace. Good luck

Roger VanTill
89 Westy "The Moose Lounge"
86 Syncro
92 Escort "The Turd" (sorry,it runs)