Originally Posted by TheOneDoubleN
I checked through the service manual this afternoon and it looks like the only way you can replace the compressor is to purge and recharge the refrigerant in the system, so I don't think that would be the issue since they swapped out the compressor and there was no change in the fluid sound.
When I had to recharge the system, the dealer was very quick to point out the amount of refrigerant needed to be close to the spec. Perhaps you have too little or too much? Think its a quick check.