Yesterday, while driving, I noticed the temp. gauge go to High. I have a new radiator and temp gauge. The anti freeze compartment was empty. I put water in and drove and once again, temp to H and no water. A man in my building said something about if I hear something in the middle of the car and I did last night. He's not around to ask what the problem is. Could someone tell me. Also, please tell me if you know if this is a big or small job. I'm sure it depends on the make and year of the car. Mine is a 90 Miata. Just a guess would help. Thanks. Caryl