Overheating issues with 1999 ford explorer 4.0 OHV

[marcus317717]

Well it started as a thermostat issue so i thought or the heater control valve so i replaced both it ran fine for three days and overheated when i turned on the heat and so i figured it wasn't going through the thermostat. so i took it back out and no coolant came from housing tested thermostat and worked like a champ all my antifreeze it going to the reservoir and not through the system don't know what it is i think it is clogged somewhere but i don't know any suggestions

 

[marcus317717]

well i tested the water pump it is fine it is leading me to believe that it is the radiator clogged bought some super flush and will try it tommorrow but any other suggestions will be great thanks

 

[marcus317717]

it is not the heads i tested those flushing out right now trying to figure it out

 

[marcus317717]

it was the heads yay for me