11 51 000 Removing and installing/replacing water pump (N52K)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 BMW 528xi, 2010 BMW 528i, 2009 BMW 528xi, 2009 BMW 528i, and 2008 BMW 528xi. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Danger 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.

IMPORTANT: If a water pump that has already been operated is reused, it must be filled with coolant immediately after removal.
Mixture ratio, water: coolant = 1:1
Protect plug connections against coolant and contamination.
Cover plug connections with suitable materials.

IMPORTANT: Aluminium-magnesium materials.
No steel screws/bolts may be used due to the threat of electrochemical corrosion.
A magnesium crankcase requires aluminum screws/bolts exclusively.
Aluminum screws/bolts must be replaced each time they are released.
Aluminum screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminum screws/bolts are not magnetic .
Jointing torque and angle of rotation must be observed without fail (risk of damage) .

Installation note: All screws, nuts, bolts and hose clamps removed during the repair must be replaced. Retaining elements on chassis and suspension and steering parts must be replaced.

Necessary preliminary tasks:

Drain coolant
Remove FRONT UNDERBODY PROTECTION
AWD only: Remove reinforcement plate

Disconnect plug connection (1). Disconnect coolant hose (2).

Tightening torque 11 53 5AZ .

Undo screws (3).

Tightening torque 11 53 1AZ .

Lay thermostat (4) to one side. Disconnect coolant hose (5).

Tightening torque 11 53 3AZ .

Fig 1: Removing Thermostat And Water Pump Connections

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Tightening torque 11 53 1AZ .

Installation note: Replace aluminum screws.

Installation note: If the electrical water pump is used again, it must be turned by one rotation due to the breakaway torque at the blade wheels.

Fig 2: Removing Water Pump

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

VENTING INSTRUCTIONS must be observed without fail .