i wouldnt recommend doing that unless you had the right equipment to make sure that your a/c system is completely evacuated. If you have a leak, it is possible that some moisture has entered into the system. R134a, the refrigerent used in the a/c system, will create hydrofluoric acid in the presence of moisture. if that has happened, the acid will attack and destroy metals and lubricants. NOTE: Hydrofluoric acid is much stronger than hydrochloric acidhaha yeah I'm going to take it somewhere else in the morning to see what they think. How hard are the a/c lines to change out myself?