To convert a vehicle's A/C system from R-12 to R-134a, you need a complete conversion kit. This kit will include:
* New O-rings and seals: R-134a requires different seals to prevent leaks. The old seals are not compatible.
* New lubricant: R-134a uses a different oil than R-12. Mixing them will ruin the compressor.
* Possibly a new accumulator/dryer: This component filters the refrigerant and often needs replacing during conversion.
* Possibly a new expansion valve or orifice tube: These components regulate refrigerant flow and may be incompatible with R-134a.
The process is complex and should only be performed by a qualified and experienced automotive air conditioning technician. They have the tools, knowledge, and safety equipment necessary to properly evacuate the old refrigerant, flush the system, install the new components, and charge the system with the correct amount of R-134a and oil.
Attempting this conversion yourself is risky and could result in:
* System damage: The compressor, condenser, evaporator, or other components could be severely damaged, leading to costly repairs or replacement.
* Personal injury: Improper handling of refrigerants can lead to serious health consequences. R-12 is also harmful to the environment.
* Environmental damage: Improper disposal of R-12 refrigerant is illegal and harmful to the ozone layer.
In summary: Don't try to do this yourself. Find a reputable mechanic with experience in A/C system conversions. The cost of a professional conversion is far less than the potential cost of repairs from a botched DIY attempt. You might even consider simply finding a shop that can recharge the existing R-12 system if that's an option, though R-12 is becoming increasingly difficult to obtain due to environmental regulations.
