64 51 591 Removing and installing/replacing evaporator (High automatic A/C)

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WARNING: Avoid contact with refrigerant and refrigerant oil.
Follow safety instructions for handling refrigerant R 134a. Refer to 64 50 ... SAFETY INSTRUCTIONS FOR HANDLING REFRIGERANT R 134A .
Follow safety instructions for handling refrigerant oil. Refer to 64 50 ... SAFETY PRECAUTIONS WHEN HANDLING REFRIGERANT OIL (FOR REFRIGERANT R 134A) .

NOTE: The time value given for this work operation does not include drawing off, evacuating and filling the A/C system!

Drain off air conditioner, refer to 64 50 009 DRAWING OFF, EVACUATING AND FILLING A/C SYSTEM (R 134A)

IMPORTANT: Risk of damage!
Restart engine only when A/C system has been correctly filled.

NOTE: If A/C system is opened for more than 24 hours: Replace desiccant insert for A/C system. Refer to 64 53 551 REMOVING AND INSTALLING / REPLACING CONDENSER FOR A / C SYSTEM (N62)
Comply with notes and instructions on handling fiber-optic cables. Refer to 61 00... NOTES ON HANDLING OPTICAL FIBERS .

Necessary preliminary tasks:

Disconnect battery negative lead, refer to 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD
Remove heater, refer to 64 11 205 REMOVING AND INSTALLING/REPLACING HEATER (BASIS AUTOMATIC A/C)
Remove heating element, refer to 64 11 208 REPLACING HEATING ELEMENT (HIGH AUTOMATIC A/C)

After installation:

Venting cooling system and checking for water leaks, refer to 17 00 009 CHECKING COOLING SYSTEM FOR LEAKS (N62)

IMPORTANT: Do not bend cooling fins.
If necessary, clean/align cooling fins with slat comb.

Remove retainers (1).

Fig 1: Removing Defroster Vents

G03291140

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock retaining lugs (2) in direction of arrow and remove defroster vents (3) towards top.

Installation:

Check retaining lugs (1) of defroster vent (2), replace defroster vent if necessary.

Fig 2: Identifying Retaining Lugs And Defroster Vent

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Courtesy of BMW OF NORTH AMERICA, INC.

Retaining lugs (1) of defroster vents must snap audibly into place.

Disconnect plug connection (1).

Fig 3: Unclipping Control Lever For Fresh Air Flap

G03291142

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (2).

Unclip control lever for fresh air flap (3).

Feed out servomotor bracket (4).

Installation:

Guide (1) of control lever for recirculating air flap (2) must be exactly seated in mounting (3) of shutter cassette (4).

Fig 4: Identifying Guide Of Control Lever

G03291143

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Fig 5: Feeding Out Shutter Cassette

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Courtesy of BMW OF NORTH AMERICA, INC.

Feed out shutter cassette (2) in direction of arrow.

Release screws (1).

Fig 6: Removing Cover For Expansion Valve

G03291145

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock arrester hook (2) and remove cover for expansion valve (3).

Disconnect plug connection (1).

Fig 7: Unclipping Linkage

G03291146

Courtesy of BMW OF NORTH AMERICA, INC.

Unclip linkage (2 3) in direction of arrow.

Release screws (1).

Fig 8: Removing Upper Housing Section Of Heater

G03291147

Courtesy of BMW OF NORTH AMERICA, INC.

Remove upper housing section of heater (2) in direction of arrow.

Detach retainers (1) from heater housing (2).

Fig 9: Detaching Retainers From Heater Housing

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Courtesy of BMW OF NORTH AMERICA, INC.

Pull evaporator (1) in direction of arrow out of heater housing (2).

Fig 10: Pulling Evaporator Out Of Heater Housing

G03291149

Courtesy of BMW OF NORTH AMERICA, INC.