64 11 207 Replacing Heater Core

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2006 BMW M3, 2005 BMW M3, 2004 BMW M3, 2003 BMW M3, and 2002 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

Remove microfilter housing. Refer to 51 71 080 REMOVING AND INSTALLING/REPLACING HEATER BULKHEAD .

Remove panel for instrument panel. Refer to 51 45 030 REMOVING AND INSTALLING INSTRUMENT PANEL TRIM .

WARNING: Danger of scalding!
Only perform this work after engine has cooled down.

Release hose clamps (1) and (2).

Fig 1: Releasing Hose Clamps

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Courtesy of BMW OF NORTH AMERICA, INC.

Detach water hoses.

Carefully blow through lines to remove remaining coolant from heating element.

Installation:

Filling and bleeding the cooling system. Refer to 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (S54) .

Withdraw temperature sensor (1). Unclip wiring harness (2).

Fig 2: Withdrawing Temperature Sensor

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Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) and remove bracket (2) from double pipe.

Fig 3: Removing Bracket From Double Pipe

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Courtesy of BMW OF NORTH AMERICA, INC.

Unclip retainers (3) and lift off cover for heating element (4).

Installation:

First insert lugs (5).

Remove retainers (1) and remove double pipe (2) towards top.

Fig 4: Removing Double Pipe

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Courtesy of BMW OF NORTH AMERICA, INC.

Raise heating element (3) at front and remove.

Installation:

Replace seals.

Coat sealing rings with antiseize agent and ensure correct seating.