64 11 205 Removing And Installing Or Replacing Heater

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2008 BMW Z4, 2007 BMW Z4, 2006 BMW Z4, 2005 BMW Z4, and 2004 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Draw off refrigerant from A/C system. Refer to 64 50 009 DRAWING OFF, EVACUATING AND FILLING A/C SYSTEM (R 134a) .
Detach lower section of steering spindle from steering column. Refer to STEERING SPINDLE LOWER SECTION .
Remove trim for instrument panel. Refer to 51 45 030 REMOVING AND INSTALLING INSTRUMENT PANEL TRIM .

WARNING: Follow instructions for working on cooling system. Refer to 17 00... INSTRUCTIONS FOR WORKING ON COOLING SYSTEM .

IMPORTANT: Carefully blow through aluminum twin pipe (on heat exchanger) to remove remaining coolant from heater element.

Release hose clamps (1) and detach coolant hoses (2).

Fig 1: Removing Coolant Hoses And Refrigerant Lines

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Installation:

Vent cooling system and check for leaks. Refer to 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (M54 / M56) .

Release screws (3) and detach refrigerant lines (4) in direction of arrow.

Installation:

Replace sealing rings.

Tightening torque 64 53 2AZ. Refer to HEATING AND AIR CONDITIONING - TIGHTENING TORQUES .

Make sure bulkhead grommet is correctly seated.

Necessary preliminary tasks:

Disconnect all necessary cable ties on support tube.
If necessary, disconnect plug connections.

Installation:

Make sure wiring harnesses are correctly routed.

Remove screws (1) and (2).

Fig 2: Removing Screws

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Installation:

Tightening torque 51 71 13AZ.

Release screws (1).

Fig 3: Removing Current Distributor

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Pull out current distributor (2) downwards and place to one side.

Installation:

Make sure guide (3) is correctly seated in mounting (4).

Unscrew nuts (5).

Installation:

Tightening torque 19.5 Nm.

Unscrew nuts (1).

Fig 4: Removing Nuts

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Installation:

Tightening torque 19.5 Nm.

Release screws (1).

Fig 5: Removing Screws

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Installation:

Tightening torque 19.5 Nm.

Release screws (1).

Installation:

Insert screws (1) slightly.

Tighten down screws (1) in sequence (A1-A4) to specified tightening torque 4 Nm.

Fig 6: Support Tube Bolts Tightening/Loosening Sequence

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IMPORTANT: Remove support tube (2) from vehicle with assistance of a second person.

Detach support tube (2) and remove from vehicle.

Remove heater (1) in direction of arrow.

Fig 7: Removing Heater

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Installation:

If necessary, replace seal (2) and seals between heater (1) and bulkhead.

Make sure condensate drain grommet (3) is correctly seated in mounting.

Make sure heater (1) is correctly seated in condensate drain grommet (3).