I put a 99 gsr motor into my civic but I have noticed it runs really hot. The temp gauge says it ok but when I pop the hood after drivng I notice it is exceptionally hot. I can even feel the heat from below the shifter inside the car.. Is it something to be worried about??? The temp gauge says its ok and my radiator wasnt swapped, its the original.. should I put a integra radiator in?? or is the original radiator good enough??? and do these motors usually run as warm as they do?