BMW X3 Service & Repair Manual: Notes for changing the air conditioning compressor (amount of refrigerant oil of new air conditioning compressor not known)

BMW X3 Service & Repair Manual / HVAC / Compressor / Notes for changing the air conditioning compressor (amount of refrigerant oil of new air conditioning compressor not known)

Special tools required:

  • 00 9 030

NOTE: This procedure only applies if the new air conditioning compressor does not have a label with the amount of refrigerant oil .

A DIFFERENT PROCEDURE applies for air conditioning compressors with a label indicating the amount of refrigerant oil.

IMPORTANT: Risk of damage! Remove the air conditioning compressor without damaging and without the use of force!

Air conditioning compressors with plastic belt pulleys:

  • Avoid impacts/knocks to plastic belt pulley (caused by tools, contact with base).
  • Return faulty air conditioning compressors in their original packaging only.

IMPORTANT: When starting up a new air conditioning compressor for the first time, it is absolutely essential to carry out the following breaking-in procedure:

  • Switch on Air conditioning system
  • Set all air vents in the dashboard to "OPEN"
  • Start engine and let it stabilize at idle speed
  • Set blower output to min. 75% of max. blower output
  • Switch on heating and air conditioning system and run for at least 2 minutes at idle speed

Risk of damage at increased engine speed!

IMPORTANT: In the event of a mechanical air conditioning compressor failure and the resulting ingress of chips into the refrigerant circuit, replace the following parts: All vehicles except I01:

  • Air conditioning compressor.
  • Replace DESICCANT INSERT
  • Line to the capacitor
  • Refrigerant oil

I01 only:

  • air conditioning compressor
  • Capacitor with desiccant insert/dryer flask
  • all expansion valves

Rinse the refrigerant circuit.

All vehicles without I01 with heat pump:

The new air conditioning compressor is filled at the factory with refrigerant oil.

The amount of refrigerant oil in the new air conditioning compressor corresponds to the amount of refrigerant oil for the entire new and unfilled refrigerant circuit.

Only I01 with heat pump:

The new air conditioning compressor and new dryer flask are filled at the factory with refrigerant oil.

The amount of refrigerant oil in the new air conditioning compressor and in the new dryer flask corresponds to the amount of refrigerant oil for the entire new and unfilled refrigerant circuit.

When replacing the air conditioning compressor it is absolutely essential to adapt the amount of refrigerant oil in accordance with the instructions below!

An adaptation is also required for the replacement of the dryer flask.

An adaptation of the amount of refrigerant oil is not required in the following cases:

  • Replacement of the complete refrigerant circuit.
  • If the refrigerant circuit was rinsed (only I01 ).

When evacuating the air conditioning system, refrigerant oil is also extracted and collected in the oil separator of the A/C service station.

After evacuation, the refrigerant must be filtered in the A/C service station as the oil separator could still contain a liquid refrigerant/oil mixture. The refrigerant completely gasifies through the cleaning operation.

Only the prior bound refrigerant oil remains in the oil separator. Measure and note down this quantity of refrigerant oil.

HVAC

  • REFER TO "DRAWING OFF AIR CONDITIONING SYSTEM"

Transfer the refrigerant oil remaining in the previous air conditioning compressor via the oil filler plug completely into a measuring cup.

HVAC

Measure the amount of refrigerant oil collected from the previous air conditioning compressor.

HVAC

Open oil filler plug and pour entire contents of air conditioning compressor into a clean collecting vessel.

Installation note:

Replace sealing rings.

Use special tool 00 9 030 to mount sealing rings without damaging them.

HVAC

From the new air conditioning compressor, pour the same amount of refrigerant oil (as drained from the previous air conditioning compressor) + 10 ml extra into a clean measuring cup and pour again into the new air conditioning compressor. At least but a total of 50 g .

Remaining refrigerant oil can be poured into A/C service station tank.

  • Refer to "EVACUATING AIR CONDITIONING SYSTEM".

HVAC

Otherwise the excess refrigerant oil must be disposed of correctly.

On account of its hygroscopic properties, refrigerant oil must not be stored in open containers.

The refrigerant oil drawn off from the oil separator of the A/C service station and from the previous air conditioning compressor must not be reused and must be correctly disposed of.

Observe country-specific waste disposal regulations.

HVAC

After installing the new air conditioning compressor, it is essential before filling the heating and air conditioning system to pour the same amount of the previously drawn off refrigerant oil into the system again.

  • REFER TO "FILLING AIR CONDITIONING SYSTEM"

HVAC

Installation note:

If the refrigerant circuit is open for longer than 24 hours:

  • REPLACE DESICCANT INSERT
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