Determining Oil Quantity On The "New" Air Conditioning Compressor

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To drain refrigerant oil:
1. 1.1. First, open the cap on the high-pressure side and relieve the pressure from the compressor -A- .
2. 1.2. Open the oil filler screw -B- on the compressor.
3. 1.3. Drain the refrigerant oil from the air conditioning compressor.
  The refrigerant oil must not be re-used, but must be disposed of properly.
  
  Fig 1: Identifying Oil Filler Screw
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
To determine the refrigerant oil quantity:
1. 2.1. V_total = "V_removed " + "V_old " + 20 cm³
2. 2.2. V_total = Total volume for the new air conditioning compressor
3. 2.3. V_removed = Volume of refrigerant oil removed by suction
4. 2.4. V_old = Volume of refrigerant oil in the old air conditioning compressor
5. 2.5. 20 cm³ = Additional safety volume
To fill the air conditioning compressor:
1. 3.1. Fill the determined refrigerant oil volume V_total into the air conditioning compressor.
2. 3.2. Always replace the sealing ring for the oil filler plug.
3. 3.3. Screw oil filler plug -B- onto the compressor. → Tightening torque: 30 Nm (22 ftlb.)
4. 3.4. Install air conditioning compressor. → Installing Air-Conditioning Compressor