I just bought a used volvo 740 turbo wagon for my son for $900. The body is great but it has a bad head gasket. I plan to pull the head and replace the gasket as soon as it gets warm enough here to work on the car. It is right around zero today and I just can't stay out there long enough to do any kind of work. My question is will I damage the car further by driving it with a bad head gasket. The only symptom is that the cooling system seems to get pressurized with exhaust fumes. The coolant looks good and so does the oil. There is no tell tale white exhaust smoke or anything like that. I know this is not a mercedes question, but the only message board I could find for volvo (brickboard.com) doesn't seem to be of the same caliber as this board. Thanks for all your advice.