Sorry, I wasn't very clear. I was just asking because so many of you are very knowledgeable and very helpful. I am not having any of these problems with my Bonneville. I just bought a Mercury 1996 Sable and read that they seem to have a problem with water pumps going out and overheating and blowing the head gasket. The water pump went out on the car the first day we drove it home
and that was yesterday. The car never over heated. The shop did a pressure test on it and confirmed the water pump had failed. So I just posed this as a general question, wondering if the pressure test they performed would reveal if the head gasket had any damage because they didn't say anything about it. Sorry for any confusion.