When I took my GTS apart last month to correct a temperature issue, I found silicone on the thermostat housing gasket. I just mistakenly thought the last person in there put it in without knowing not to. WRONG! I got everything back together with new thermostat, radiator and water pump and when driving in traffic I could smell coolant very faintly. Finally found a very small puddle just to the front pass side of the thermostat housing. BUMMER. I guess whoever put the last thermostat in the car buggered up the surface on the block ever so slightly. Oh well, I guess I need the practice pulling and reinstalling the intake anyway. Plus, now i have to silicone the gasket too. Just thought I'd whine a bit. Art