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I changed the fan, water pump, thermostat and housing, radiator cap and had a flush it stills over heat only when the car on and idolizing but not when I’m driving at a constant speed. Idk what to do. I heard it can be electric or head gasket but I don’t want to waste money on neither one with out knowing. The shop said the DONT know why it’s over heating.
 

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Does the fan turn on at idle when the engine warms up? If not, then it could be a problem with the fans, or the temp sensor.
 

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You probably have a ton of gunk built up behind the ac evaporator coil and in front of the radiator. There is a 1 inch gap between them. You can get to it from the topside. There is enough room to bet an air nozzle or hose to wash that crap off. Its happened to me on my armada and 45..
 
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