LS_SANDHU

Coolant temperature goes up really high and fans are really loud? Radiator? Coolant flush?

LS_SANDHU

Temperature goes to 240-255 and both fans are in high speed like you said happens when car is going lower speeds like in constant stop and go traffic

Not4spd

Have you pulled the radiator shroud to see if the radiator is clogged?

TorqueWinsRaces

I have cleaned my radiator 3 times since I have owned the car; it takes less than 1/2 hour. Remove the intake tract. Remove the cover that goes over the radiator and condenser. The radiator sits in a holder, slide it out of the holder and now you can get some space between the radiator and condenser. I have a small 3M electronics vacuum that I now use to clean the radiator. Piece of pie and no more hot car.

Edit- Actually, I think it's the condenser that sits in the holder. You move the condenser forward and that gives you room to access the radiator because it sits behind the condenser.