ther are many things that can cause your car to over heat. the best awnser i can give is take it to a shop and ask them to do a preasure test on ur radiator this is what i do for a living and the preasure test is not very expensive and it will pin point you problem. could be a leaking water pump blown head gasket hoses or thermostate but the preasure test is the cheapest way to find out the correct problem that way you dont get over charged. good luck to ur problem. dont take the first price that is thrown ur way shop around after the preasure test.