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

WARNING: This page is about a different variant/trim than selected.

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) .

Necessary preliminary tasks:

Remove COOLANT THERMOSTAT
Remove front right CROSS STRUT (E89 only )

Loosen hose clamps (1).

Remove coolant hose.

Tightening torque 11 53 5AZ .

Unfasten hose clip (2).

Remove coolant hose.

Tightening torque 11 53 3AZ .

Disconnect plug connection (4).

Release screws (3).

Tightening torque 11 53 1AZ .

Release screws (5).

Tightening torque 11 51 1AZ .

Installation:

Replace aluminum screws.

Fig 1: Identifying Coolant Hose, Plug Connection And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

If the electric water pump is reused, it must be rotated one turn due to the breakaway torque at the blade wheels.

Assemble engine.

VENTING INSTRUCTIONS must be observed without fail .