64 11 206 Removing and installing/renewing heating unit

WARNING: This page is about a different car, the 2011 BMW M3, 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Risk of injury!
Refrigerant circuit is under high pressure!
Avoid contact with refrigerant and refrigerant oil.

Follow safety instructions for handling R 134a refrigerant See 6450... SAFETY INSTRUCTIONS FOR HANDLING R134A REFRIGERANT or 6450... INSTRUCTIONS FOR HANDLING REFRIGERANT R 134A .
Follow safety instructions for HANDLING REFRIGERANT OIL .

FOLLOW INSTRUCTIONS FOR WORKING ON COOLING SYSTEM .

IMPORTANT: Risk of damage!
Restart engine only when air conditioning system has been correctly filled.
Follow INSTRUCTIONS for opening and replacing parts in refrigerant circuit.
If air conditioning system is opened for more than 24 hours:REPLACE DESICCANT INSERT FOR A/C SYSTEM

Necessary preliminary tasks:

Draw off REFRIGERANT FROM A/C SYSTEM
Remove INTAKE AIR MANIFOLD
Remove SECONDARY-AIR PUMP
Remove LOWER SECTION OF STEERING SPINDLE
Remove LEFT (OR RIGHT) SUSPENSION CROSSBRACE
Remove EXPANSION VALVE
Remove INSTRUMENT PANEL TRIM
Remove COMPLETE STEERING COLUMN
Remove AIR DUCTS
Remove CARRIER FOR INSTRUMENT PANEL

Release cap (1) on bulkhead and release screw underneath.

Tightening torque 64 11 1AZ .

Fig 1: Identifying Cap On Bulkhead

Courtesy of BMW OF NORTH AMERICA, INC.

Unclip refrigerant lines (2).

Unscrew nuts (2).

Feed out media passage sealing plate (3) and associated rubber grommet.

Installation:

Makes sure media passage sealing plate and associated rubber grommet are correctly seated.

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

Fig 2: Identifying Sealing Plate, Refrigerant Lines With Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Protect working area (1) against escaping coolant.

Remove heater (2) with a second person helping from vehicle.

Fig 3: Identifying Working Area Of Coolant And Heater

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Make sure heater is correctly seated.

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

Fig 4: Identifying Condensate Drain And Grommet

Courtesy of BMW OF NORTH AMERICA, INC.

After installation

Replacement

Effective 09/2009, vehicles with SA 606 (Navigation Business) or SA 609 (Navigation Professional) will no longer have ventilation hose (1) on heater (2). In addition, vehicles manufactured up to 09/2009 will no longer require ventilation hose (1) for parts replacement.

Fig 5: Identifying Ventilation Hose On Heater

Courtesy of BMW OF NORTH AMERICA, INC.