If the AC compressor is damaged on your Bentley Continental GT and you want to replace by yourself, here are some tips and tricks from the gearbox auto service team. You can replace an AC compressor yourself by first making sure you’ve added the correct amount of oil. There’s a specific amount of oil inside the compressor crank case and oil throughout whole AC system.The oil in the compressor crankcase lubricates the mechanical moving parts, while the oil in the overall system is carried by the refrigerant to lubricate the compressor’s parts (pistons and valves). •\ Remove all remaining refrigerant and measure exactly how much oil came out with it.•\ Remove the old compressor. Then drain and measure •\ Drain any oil inside the new compressor.•\ Flush the whole AC system and make sure to add new oil •\ Install the new AC compressor •\ Remove the air/gas from the AC system and then recharge using an AC refrigerant scale.