64 11 273 Replacing water valve for heating unit

WARNING: Scalding hazard!
Work on the cooling system may only be carried out when it has cooled down.
Follow INSTRUCTIONS for working on cooling system.

NOTE: CLAMP OFF coolant hoses on water valve.

Recycling:

Coolant emerges when coolant lines are detached. Have a suitable collecting container ready.

Catch and dispose of escaping coolant.

Observe country-specific waste-disposal regulations.

Necessary preliminary tasks:

N54 Only:

Remove both blow-off valves

N63 only:

Remove INTAKE SILENCER HOUSING
Remove COOLANT EXPANSION TANK

NOTE: Engine is shown removed for purposes of clarity.

Disconnect plug connection (1).

Release hose clamps (2, 3) and detach coolant hoses.

Installation:

Do not mix up connections of coolant hoses.

Replace damaged coolant hoses.

Fig 1: Identifying Plug Connection And Hose Clamps

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

To avoid the buildup of noise, make sure that the rubber mounts (1) on the water valve are securely seated in the mounting on the frame side member (2).

Fig 2: Identifying Rubber Mounts And Frame Side Member

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

FILL AND VENT cooling system and CHECK FOR LEAKS