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

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WARNING: Danger of scalding!

Only perform these tasks on an engine that has cooled down.

Recycling:

Catch and dispose of drained coolant.

Observe country-specific waste-disposal regulations.

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.

The end faces of aluminium screws/bolts are painted blue for the purposes of reliable identification.

Jointing torque and angle of rotation must be observed without fail (risk of damage ).

If a water pump which has already been operated is reused, it must be filled immediately after being removed with coolant (mixture ratio 1:1 / water : coolant).

Necessary preliminary tasks:

Remove Coolant Thermostat.

Disconnect water hose (1).

Disconnect plug connection (4).

Release screws (5).

Installation:

Replace aluminium screws.

For tightening torque refer to 11 51 1AZ in 11 51 WATER PUMP AND DRIVE (N52) .

Installation:

If the water pump is to be reused, it must be mechanically rotated once (breakaway torque at impellers).

One water pump rotation will be sufficient.

Fig 1: Identifying Water Hose, Plug Connection And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Venting Instructions must be observed without fail.