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

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:

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.