I would leak down test the motor anyway just to be sure. i repaired a civic at work that kept complaining of an overheating problem but no other symptoms. did a leakdown test of the motor and determined the head gasket was leaking. pulled the head and it was warped, re-surfaced the head installed a new gasket and the car has not been back for that yet.
so leakdown check the motor and make sure you remove the radiator cap fill it full and look for air bubbles coming up through the coolant.