I have a 2004 F150 with a 4.6 Titan engine. I changed the thermostat and gasket with the engine stone cold and now have a small leak that I can not find dripping out of or running down the bottom rear of the bell housing. I have checked the 2 bolts to the thermostat housing (metal) and have no leaks and they are tight. The temperature gauge runs in the normal area and does not over heat. I have also checked the oil and have no water in it. I have changed many thermostats in my life on other engines and this was to me just like all the others. Please reply ASAP, this is my only vehicle for work
Any Ideas?
Thanks

Uncle_Ed

 

Can you see if the coolant is running down the valley under the intake manifold? Then dripping out by the bell housing? You should see white runs from the dried coolant. Other than that check your heater core hoses and tubes by the back of the intake for leaks.