Whats involved with converting to R134a?
The EPA says you must change all the service ports and install an under-hood sticker so that Freon is not accidentally installed at a later date. The oils used for Freon and R134a are incompatible. Therefore as much as possible of the mineral oil used for Freon must be removed from the system. This is done by removing the compressor from the car and draining it into a container, draining or better yet replacing the receiver dryer, and flushing the condenser and lines with a pressurized flushing agent. All of the O-ring removed during this operation must be replace with a type designed for R134a. In my opinion all O-ring and hoses in the system need not be replaced during a conversion as some mechanics recommend. They have been soaked in mineral oil during their service and that will prevent the R134a from leaking. (The conversion is way too expensive otherwise). However, any O-ring or hoses replaced at a later date should be the type designed for R134a. Then the system is charged to ab
