95LSC32V said:Blown head gaskets on the 4.6 dohc are very rare. If you are truly concerned and want to know for sure, take it to a mechanic, he could do tests to determine if it's the head gaskets or not. If you have replaced the coolant, thermostat and water pump and have no air pockets and the radiator is not clogged, it maybe possible you have a blown head gasket.