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

WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.

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

Release hose clamp (5) with a suitable tool.

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

Courtesy of BMW OF NORTH AMERICA, INC.

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 .