Try replacing the Thermostatic adjusment housing. Its the unit in front of your thermostat housing that your coolant lever release cable that runs to the side dash mounted levers run to. Are the pipes getting hot when at running temp past the unit??/Are the hoses at the heater matrix/heater box hot?Is your fan in the heater box operating??? :dunno: :wave:melcow said:need getting heater hot..been replace radiator and themsator too.still cold??