231k on car. AC system unopened until I replaced the RCV because it would not turn on. Turned on fine after that, but a lack of cooling and low side pressure is too high and high side pressure way too low. Probably compressor failure. Since the system holds pressure and has not been opened up except for quick RCV change, can I get away with just replacing the compressor or would you guys do the whole thing: expansion valve, receiver dryer, condenser and compressor? THANKS!