11 53 090 Removing and installing/replacing auxiliary water pump for exhaust turbocharger (N63)

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

Recycling

Catch and dispose of drained coolant in a suitable container.

Observe country-specific waste disposal regulations.

Necessary preliminary tasks:

Remove charge air cooler EXPANSION TANK .

Unclip coolant hose (1) from bracket (3) and lay in direction of arrow to one side.

Unfasten screws (2).

Tightening torque 11 51 4AZ .

Fig 1: Removing Coolant Hose From Bracket

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Risk of damage!
Coolant emerges when the coolant hoses are detached from the auxiliary water pump (3).
Cover surrounding components and plug connections with suitable apparatus

Fig 2: Identifying Auxiliary Water Pump, Coolant Hose And Clamp

Courtesy of BMW OF NORTH AMERICA, INC.

Release hose clamp (5) with a suitable tool.

Installation note:

Replace hose clamp (5).

Detach coolant hose (4) and lay to one side.

Release hose clamp (1) with a suitable tool.

Detach coolant hose (2) and lay to one side.

Disconnect plug connection (2).

Installation note:

Plug connection (2) must snap audibly into place!

Lift out auxiliary water pump (1).

Release holder (3) from auxiliary water pump (1).

Fig 3: Identifying Auxiliary Water Pump, Plug Connection And Holder

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Top up COOLANT .

VENTING INSTRUCTIONS must be observed without fail .