Pontiac Repair: air conditinor, r 12 refrigerant, ring seals

Question
91 grand prix le 3.1 i just got car for my daughter.no cold air got air charger at store.where do i screw in to charge

Answer
Hi Bruce:

The charger you got will not work on this car. That car had r-12 refrigerant which is no longer sold. You got a charger for 134A. the system has to be retrofitted to accept 134. the fitting on the lines are different. There is a kit that has to be installed on the car to make the new charge work in an old charge system. it's not a job for the do it your selfer. the kit includes different oil o-ring seals for all the lines and then you need to charge the system.