17 11 100 Removing and installing/renewing coolant expansion tank (N63)

Necessary preliminary work

Drain COOLANT .
Remove left TRAILING LINK .
Remove left INTAKE PORT .
Release expansion tank for hydraulic steering or dynamic drive and place to one side. See REMOVING/INSTALLING/REPLACING FLUID RESERVOIR . For vehicles with Dynamic Drive, see REMOVING/INSTALLING/REPLACING OIL RESERVOIR (VEHICLES WITH DYNAMIC DRIVE) .

Release screw (1).

Tightening torque 17 10 2AZ .

Release and disconnect coolant hoses (2).

Raise expansion tank (3)

Fig 1: Identifying Coolant Hoses, Expansion Tank And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock connector (1) on coolant level switch and disconnect.

Remove expansion tank (2).

Fig 2: Identifying Coolant Expansion Tank And Connector

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Top up COOLANT .

Check cooling system for LEAK TIGHTNESS .