11 51 000 Removing and installing/replacing coolant pump (N52)

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.

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: Aluminum-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 .
Joining 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 work:

Release ANTI-ROLL BAR .
Drain COOLANT .

Loosen hose clamps (1).

Detach coolant hoses.

Disconnect plug connection (2).

Release screws (3).

Tightening torque 11 51 1AZ .

Remove electric coolant pump in downward direction.

Installation note:

Replace aluminum screws .

Installation note:

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

Fig 1: Identifying Plug Connection, Hose Clamps And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

FILLING AND VENTING COOLING SYSTEM .