08-27-05, 03:23 PM
98 DeVille runs great but loses a pint of coolant per week for past year. It has been pressure checked 5 times and no leaks found. No smoke coming from exhaust (head gasket problem). No coolant on garage floor. I do not know what to do. I drive the car 90 miles/hour with hard acceleration. Is that a factor? Any help would be tremendously appreciated.