17 13 020 Removing and installing/replacing expansion tank for charge air cooler (N63 B40/B44 O 1)

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IMPORTANT: Risk of scalding!
Only perform this repair work after engine has cooled down.

Necessary preliminary tasks:

Remove ACOUSTIC COVER
FOLLOW instructions for repair work on the cooling system.

Release the coolant hoses and wiring (1) from the expansion tank and set aside.

Fig 1: Identifying Coolant Hoses, Wiring And Expansion Tank

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (3).

Tightening torque 17 10 7AZ .

Pinch off coolant hoses on the expansion tank with PINCH-OFF TOOLS (to prevent coolant from escaping).

Release coolant hoses (1) and (2) from expansion tank and detach.

Catch and dispose of escaping coolant.

Remove expansion tank.

Fig 2: Identifying Coolant Hoses And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Fill and bleed cooling system . See 17..... BLEEDING COOLING SYSTEM FOR CHARGE AIR COOLER (N63 B40/B44 O 0/1) or 17 11... BLEED AND FILL THE COOLING SYSTEM FOR THE CHARGE AIR COOLER WITH THE VACUUM FILLING UNIT for charge air cooler.

Check cooling system for charge air cooler for leaks.