64 11 206 Removing and installing or replacing heater

WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. 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.
Remove fresh air duct.
Remove trim for instrument panel. See 51 45 030 REMOVING AND INSTALLING INSTRUMENT PANEL TRIM .
Remove temperature sensor for cold-air distributor.

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

WARNING: To avoid injury, cover holder (1) on support tube (2).

Fig 1: Identifying Cover Holder And Support Tube

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Unscrew nuts (1).

Installation:

Tightening torque, 64 53 8AZ see 64 53 REFRIGERANT LINES AND EXPANSION VALVE .

Detach refrigerant line (2) in direction of arrow.

Unclip refrigerant line (3).

Fig 2: Identifying Refrigerant Line

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WARNING:

When installing heater, make sure left and right air ducts are correctly seated.
Check left and right air ducts for leaks.
If necessary, reseal left and right air ducts with butylene tape (sourcing reference: BMW Parts Service).
If left and right air ducts are resealed, make sure flaps can move freely.

Feed out rubber grommet (1).

Installation:

Make sure rubber grommet (1) is correctly seated.

Release nut (2) and detach refrigerant lines (3) and (4) in direction of arrow.

Installation:

Tightening torque 64 53 7AZ, see 64 53 REFRIGERANT LINES AND EXPANSION VALVE

Replace sealing rings.

Release nuts (5) on right air duct.

Fig 3: Identifying Refrigerant Line And Nuts On Right Air Duct

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Installation:

Tightening torque 64 11 4AZ, see 64 11 HOUSING, HEATER/AIR CONDITIONER

Feed out rubber grommet (1).

Installation:

Make sure rubber grommet (1) is correctly seated.

Release spring clamps (2) and detach coolant hoses (3).

IMPORTANT: Carefully blow through aluminum triple pipe to remove remaining coolant from heat exchanger for heating system.

Fig 4: Identifying Spring Clamps And Coolant Hoses

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Installation:

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

Release nuts (4) on left air duct.

Installation:

Tightening torque 64 11 4AZ, see 64 11 HOUSING, HEATER/AIR CONDITIONER

Disconnect rear compartment air duct (1) in direction of arrow.

Installation:

Make sure rear compartment air duct (1) is correctly seated.

Fig 5: Identifying Rear Compartment Air Duct

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Release screws (1).

Remove left air duct (2) in direction of arrow.

Fig 6: Identifying Left Air Duct

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Release screws (1).

Remove right air duct (2) in direction of arrow.

Fig 7: Identifying Right Air Duct

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Carefully lever out locks (1) and (2).

Detach air distributor (3) in direction of arrow.

Installation:

Make sure air distributor (3) is correctly seated.

Fig 8: Identifying Air Distributor

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IMPORTANT: Follow instructions for handling optical fibers. See 61 00... NOTES ON HANDLING OPTICAL FIBERS .

Necessary preliminary tasks:

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 routed and secured.

If necessary, remove CD changer (1). See AUDIO, NAVIGATION, ANTI-THEFT & RESTRAINT - REPAIR .

Loosen screws (2).

Set fuse-carrier (3) down in footwell.

Fig 9: Identifying Fuse-Carrier

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Release screws (1).

Installation:

Tightening torque 32 31 6AZ, see 32 31 STEERING COLUMN

Fig 10: Identifying Screws

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Release screws (1).

Installation:

Tightening torque 51 71 15AZ, see 51 71 SEALS AND LOOSE BODY PARTS

Fig 11: Identifying Screws

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Release screws (1).

Installation:

Tightening torque 51 71 15AZ, see 51 71 SEALS AND LOOSE BODY PARTS

Fig 12: Identifying Screws

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Unscrew nuts (1).

Installation:

Tightening torque 51 71 15AZ, see 51 71 SEALS AND LOOSE BODY PARTS

Fig 13: Identifying Nuts

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Unscrew nuts (1).

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

Installation:

Tightening torque 51 71 15AZ, see 51 71 SEALS AND LOOSE BODY PARTS

Fig 14: Identifying Support Tube

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If necessary, unlock and disconnect plug connections on heater.

Remove heater (1) in direction of arrow.

Installation:

Make sure heater (1) is correctly seated.

Fig 15: Identifying Heater

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Installation:

Make sure condensate drain (1) is correctly seated in grommet (2).

Fig 16: Identifying Condensate Drain And Grommet

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