64 52... Instructions for compressor replacement

WARNING: This page is about a different variant/trim than selected.

Notes

IMPORTANT: Compressors with plastic belt pulleys:

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

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

Switch on Air conditioning system
Set all air vents in instrument panel to "OPEN"
Start engine and let it stabilize at idle speed
Set blower output to min. 75% of max. blower output
Switch on Air conditioning system and run for at least 2 minutes at idle speed (risk of damage at increased engine speed!)

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

After evacuation, the refrigerant must be filtered in the service station as the oil separator could still contain a liquid refrigerant/oil mixture. The filtering process gasifies the refrigerant completely and only the previously bound refrigerant fluid remains in the oil separator. Measure and note down this quantity of refrigerant fluid, REFER TO EVACUATING A/C SYSTEM .

Fig 1: Identifying Air Conditioning Evacuating System Arrangement

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 2: Draining Refrigerant Fluid

Courtesy of BMW OF NORTH AMERICA, INC.

Measure the amount of refrigerant fluid collected from the previous compressor.

Fig 3: Measuring Refrigerant Fluid Collected From Compressor

Courtesy of BMW OF NORTH AMERICA, INC.

The new compressor is filled at the factory with refrigerant fluid. Open filler plug and pour entire contents of compressor into a clean collecting vessel.

Installation note:

Replace sealing rings.

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

Observe tightening torque 64 52 2AZ.

Fig 4: Pouring Out Compressor Content In Clean Vessel

Courtesy of BMW OF NORTH AMERICA, INC.

From the new compressor, pour the same amount of refrigerant fluid (as drained from the previous compressor) + 10 g extra into a clean measuring cup and pour again into the new compressor.

Remaining refrigerant fluid can be poured into service station tank, REFER TO EVACUATING A/C SYSTEM .

Otherwise the excess refrigerant fluid must be disposed of correctly.

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

Fig 5: Measuring Refrigerant Fluid In Vessel

Courtesy of BMW OF NORTH AMERICA, INC.

The refrigerant fluid drawn off from the oil separator of the service station and from the previous compressor must not be reused and must be correctly disposed of.

Fig 6: Disposing Refrigerant Fluid

Courtesy of BMW OF NORTH AMERICA, INC.

After installing the new compressor, it is essential before filling the A/C system to pour the same amount of the previously drawn off refrigerant fluid into the system again, REFER TO EVACUATING A/C SYSTEM .

Fig 7: Identifying Air Conditioning Refilling System Arrangement

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

If air conditioning system is opened for more than 24 hours: REPLACE DRYER FLASK/DESICCANT INSERT .