17 11 100 Removing and installing/replacing coolant expansion tank

Necessary preliminary tasks: 

• Follow notes for CARRYING OUT REPAIR WORK ON THE COOLING SYSTEM .
• Using a suitable tool, disconnect coolant line on coolant expansion tank.

Unfasten screws (2).

Tightening torque 17 10 4AZ .

Unlock and disconnect coolant hoses (3).

Raise expansion tank (4)

Fig 1: Identifying Expansion Tank, Coolant Hoses, Clamps And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

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

Remove expansion tank (2).

Installation note: 

Make sure retaining pin (3) is fitted correctly in rubber mount (4).

Fig 2: Identifying Coolant Level Switch Connector, Expansion Tank And Retaining Pin

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Top up COOLANT .

Check COOLING SYSTEM FOR LEAKS .