B18B in a 93 SI. When i start driving the car is fine, when i come to a stop light or traffic the temp gauge goes up pass the have mark.. Sometimes the fan comes on. When im driving on the highway the temp is fine i guess cuz the air hitting the rad which cools it down..I changed thermostat,flushed the coolant, and the water pump is not making ne noise..Could it be that i need a new rad????? Thanx in advance!!!!!