Why is it that with the Interdynamics Retrofit Kit you don have to change or alter any internal components?
In the beginning, when retrofitting vehicle air conditioning systems first came up, it was assumed that major components of the system designed for use with R-12 would have to be changed to R-134a compatible components. As more research was done, and as vehicles were actually retrofitted, we learned more and more about the process, namely that much less had to be done than was originally thought. If an R-12 system is functioning properly, components do not have to be changed, and the R-12 refrigerant can be replaced with R-134a without opening up the system. If, however, the system is not functioning and repairs must be made, then the defective parts should be replaced with R-134a compatible parts. Hoses and O-Rings (if not damaged) do not need to be replaced, because the mineral oil used in the R-12 system is absorbed by the rubber, and actually forms a protective barrier, protecting it from the R-134a. What makes the Interdynamics Retrofit method different from other retrofit methods
