I am repairing my A/C system in my 88 IROC. I am putting in a new accumulator, orifice tube, o-rings, and a new compressor. I then plan on recharging with PAG oil and 134a. My question is, what exactly is in a retrofit kit? From what I can see, the only difference is the valves, but the manifold gauge set I have connects directly to the existing valves already in the vehicle, and I can recharge through the manifold guages. So, would it be really necessary to change the valves? (Or am I missing something and have the valves already been replaced?)

Thanks

 

what do your valves look like?

 

are the valve you have now quick diconnect? If so, they have already been changed over. I like the 134 quick disconnect valves. Don't forget to pull a vacuum on the system before you charge it.