If it overheated, the new thermostat is gone. Guaranteed. Change that out and report back.

 

I am having the same problem. All winter car was fine (because of cold probably), but now it overheats while driving, especially starts overheating at wot. I replaced all coolant hoses, installed brand new low temp thermostat, new radiator, filled with water and water wetter and still overheats. Maybe it's the little temp sensor on the thermostat housing? I'm going to remove the thermostat and let it run cold and see if that's the problem. This car will be the end of me...

 

hey by chance did you replace your two hoses for the heater core, they run from back of thermostat housing to firewall to the left of the brake master cylinder if your lookin at engine bay, mine had an issue with overheating since mine were leakin there, other then that your other options are either a water pump leaking, or the throttle body coolant lines might be leaking or your coolant line for turbo...one of those.

 

it must be commen. i just noticed my evo is using water and overheating when i come to a stop. ill have to run a comp check in the morn, and do thermostat and flush the system

 

Check ur thermostat mine went out at 120k

 

i removed my thermostat and it still wanted to heat up when i came to a stop

 

I fixed this same problem. It was a combination of faulty thermostat (replaced oem with mishimoto) and radiator (replaced with mishimoto radiator). I'm not 100% sure what it fixed, but after installing these 2 parts the overheating is gone.

 

Maybe I missed it, but did you replace the radiator cap?

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