Nissan and Datsun Workshop Service and Repair Manuals

Refrigerant Oil: Service and Repair
Inspection

LUBRICANT

Inspection

If a compressor is malfunctioning (internal noise, insufficient cooling), check the compressor oil.
1.COMPRESSOR OIL JUDGMENT
1. Remove the compressor.  See: Compressor HVAC/Service and Repair/Exploded View.
2. Sample a compressor oil and judge on the figure.

Judgement result 1-Replace compressor only.
Judgement result 2-Replace compressor and liquid tank.