64 12 ... Replacing Burner Insert For Independent 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: Scalding hazard!
Carry out following tasks after engine and independent heater have cooled down.
Follow instructions for Working on cooling system! See 17 00 ... INSTRUCTIONS FOR WORKING ON COOLING SYSTEM .

IMPORTANT: The burner insert may only be replaced after the 24-month warranty period has elapsed.
The entire independent heater must be replaced during the warranty period.

Necessary preliminary tasks:

Remove complete independent/auxiliary heater . See 64 12 021 REMOVING AND INSTALLING COMPLETE INDEPENDENT HEATER .

Release screws (1) and remove bracket (2) from heater.

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

Fig 1: Identifying Heater Bracket And Screws

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Release hose clamp (1) on hose for circulating pump and disconnect hose.

Release hose clamp (2) on intake filter hose and disconnect hose.

Installation:

Check all water hoses for damage, replace if necessary.

Fig 2: Identifying Hose Clamp

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Carefully lift cover (1) off heater.

Fig 3: Identifying Lift Cover Off Heater

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Disconnect plug connection (1).

Fig 4: Identifying Plug Connection

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Disconnect plug connection (1).

Fig 5: Identifying Plug Connection

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Release screws (1).

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

Replace all screws.

Carefully lift out combustion air blower unit (2).

Fig 6: Identifying Combustion Air Blower Unit And Screws

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Release screws (1) and pull out burner insert (3) with grommet (2).

Replace all screws.

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

Installation:

Make sure grommet (2) is in correct installation position.

Fig 7: Identifying Grommet, Burner And Screws

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Installation:

Replace seals (1, 2) and clean sealing surfaces thoroughly.
If necessary, remove soot deposits.
To prevent the fuel pipe on the burner element being damaged, coat seal (2) with spirit when fitting housing.

Fig 8: Identifying Seals
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After installation:

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