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

WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2013 BMW 328xi, 2013 BMW 328i, 2012 BMW 328xi, 2012 BMW 328i, and 2011 BMW 328xi. 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 aluminium screws/bolts exclusively.

Aluminium screws/bolts must be replaced each time they are released .

Aluminium screws/bolts are permitted with and without color coding (blue).

For reliable identification:

Aluminium 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

Unfasten hose clip (1).

For tightening torque refer to 11 53 5AZ in 11 53 COOLANT THERMOSTAT WITH CONNECTIONS .

Remove coolant hose.

Unfasten hose clip (2).

For tightening torque refer to 11 53 3AZ in 11 53 COOLANT THERMOSTAT WITH CONNECTIONS .

Remove coolant hose.

Disconnect plug connection (3).

Release screws (4).

For tightening torque refer to 11 51 1AZ in 11 51 ELECTRIC WATER PUMP WITH DRIVE .

Fig 1: Plug Connection, Screws And Hoses

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace aluminium screws.

Remove electric water pump (x) via x.

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.