My new to me 2000 JGC Limited 4.7 had water dripping from the thermostat housing so I decided to make it stop. I bought new thermostat and housing, drained the coolant removed the thermostat and about a tube of black RTV. I don't think the thermostat was in the housing properly, the bolts were very tight. Cleaned the area removing all the dried RTV installed the new Thermostat, no RTV, filled system. NO leaks Not a drop. Life is good, but garage floor is cold, and hard.