My 1992 didnt have air,, so what the hell let me recharge it,, well the autoparts store sells this retro fit kit to r134a for like 89.00, so i tried it, my NSX has freezing cold air, the kit is so simple to do, even comes with a DVD to watch and step by step instruction, its basiclly screw on the new Valve stems, and fill it,, the kit come with a filler to stop leaks, and 3 can of refridg, I filled it and it started to blow real cold on one side only, then i filled it till both sides of the car blew cold air,, trust me its worth it to try before you go to a dearship, check it out, a 2 year old can screw in a new valve,