64 11 205 Removing And Installing/Replacing Heater

WARNING: This page is about a different car, the 2008 BMW Alpina and 2007 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Avoid contact with refrigerant and refrigerant oil.
Follow safety instructions for handling refrigerant R 134a . See 64 50 ... INSTRUCTIONS FOR HANDLING REFRIGERANT R 134A .
Follow safety instructions for handling refrigerant oil . See 64 50 ... INSTRUCTIONS FOR HANDLING REFRIGERANT OIL (FOR REFRIGERANT R 134A) .
Follow instructions for working on cooling system! See 17 00 ... INSTRUCTIONS FOR WORKING ON COOLING SYSTEM .

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

Comply with notes and instructions on handling optical waveguides. See 61 00 ... NOTES ON HANDLING OPTICAL FIBERS .

If A/C system is opened for more than 24 hours: Replacing drier insert for A/C system . See 64 53 515 REPLACING DRIER INSERT FOR A/C SYSTEM (AUTOMATIC A/C BASIC) .

Necessary preliminary tasks:

Drawing off, evacuating and filling the A/C system are not included in the time value given for this work operation. See 64 50 009 DRAWING OFF, EVACUATING AND FILLING A/C SYSTEM (R 134A) .
Disconnect battery negative lead . See 12 00 ... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY .
If necessary, remove acoustic cover
Remove centre of assembly compartment bulkhead . See 51 71 085 REMOVING AND INSTALLING CENTER OF ASSEMBLY COMPARTMENT BULKHEAD .
Remove fresh air duct on left and right. See 64 31 056 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT FRESH-AIR DUCT (AUTOMATIC A/C HIGH) .
Remove trim on instrument panel. See 51 45 030 REMOVING AND INSTALLING INSTRUMENT PANEL TRIM .

Gently pull out locks of quick-release couplings (1) and detach coolant hoses (2).

IMPORTANT: Carefully blow through aluminum triple pipe to remove remaining coolant from heater element.

Installation:

Vent cooling system and check for leaks. See 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (N62, N62TU) .

Release screws (3) and detach refrigerant lines (4).

Installation:

Replace sealing rings.

Tightening torque. See HEATING AND AIR CONDITIONING - TIGHTENING TORQUES -- ALPINA

Fig 1: Identifying Quick-Release Couplings, Coolant Hoses, Refrigerant Lines And Screws

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Release steering spindle lower section . See 32 31 070 REMOVING AND INSTALLING / REPLACING LOWER SECTION OF STEERING SPINDLE .

Unscrew nuts (1).

Installation:

Check that grommet (2) is correctly seated

Fig 2: Grommet And Nuts

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Disconnect all necessary cable ties on support tube
Release wiring harnesses/cable ducts and lay to one side
If necessary, remove control units/disconnect plug connections

Installation:

Make sure wiring harnesses/cable ducts are correctly secured and laid.

Release retainers and unclip defroster vent (1) at catches.

Carefully lift out defroster vent (1).

Unfasten screws (2).

Installation:

Tightening torque. See HEATING AND AIR CONDITIONING - TIGHTENING TORQUES -- ALPINA

Unscrew nuts (3).

Fig 3: Identifying Defroster Vent, Nuts Screws

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Release screws (1).

Lay fuse-carrier (2) to one side.

Unscrew nuts (3).

Fig 4: Identifying Fuse-Carrier, Nuts And Screws

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Unscrew nuts (1).

Detach support tube (2) and remove from vehicle with assistance of a second person.

Fig 5: Identifying Support Tube And Nut

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Remove soundproofing on left and right from heater
Disconnect plug connections
If necessary, release wiring harness and lay to one side

Installation:

Make sure soundproofing on left and right is correctly seated.

Ensure correct wiring harness routing.

Unscrew nuts (1).

Remove heater (2) in direction of arrow.

Installation:

Make sure heater (2) is correctly seated.

Fig 6: Removing Heater

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Installation:

Make sure condensate drain (1) and intermediate piece (2) on left and right are correctly seated.

Fig 7: Identifying Condensate Drain And Intermediate Piece

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After installation:

Bleeding cooling system and checking for water leaks. See 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (N62, N62TU) .
Evacuate and fill A/C system . See 64 50 009 DRAWING OFF, EVACUATING AND FILLING A/C SYSTEM (R 134A) .