RETROFIT OR NOT?
The OEMS say R-12 should be used in all R-12 systems as long as it is available because R-12 provides the best cooling performance in these applications. They say theres no need to retrofit to R-134a or to use any other refrigerant as long as the system is cooling normally. But if the system requires major repairs such as a new compressor or condenser, the cost to retrofit may be justified. The OEMS say switching an older R-12 system to R-134a does not require a lot of modifications in many instances. Changing the accumulator or receiver-dryer, removing the old compressor oil and replacing the high pressure switch is generally all thats neededa job that can usually be done for less than $200. For more information, consider purchasing the R134A RETROFIT GUIDE (http://www.carleysoftware.com/retrofit.htm)on this website. OEM as well as aftermarket retrofit kits are now available for such conversions. But some vehicles (namely those with viton compressor seals, compressors that cant handle
