I have an overheating problem again with my truck. Last summer i replaced the hoses, water pump, thermostat, rad, got it flushed. I have been mudding since then but not for about 6 months. The thermostat leaks a little and I have changed it twice and still leaks. Could it just be that, because today I am going to get a new housing for it and thermostat again. Since it has a paper gasket should I put gasket sealer on both sides or one. Because I just put it on the bottom side of gasket. Could it be the heater valve? I know it is not the heater core because i do not smell radiator fluid inside the cab.