1151000 Removing and installing/replacing water pump (N51)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2010 BMW 328xi, 2010 BMW 328i, and 2009 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Danger of scalding!
Only perform these tasks on an engine that has cooled down.
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 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).
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).
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).
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 aluminum screws.
Tightening torque: 11 51 1AZ .
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.
Assemble engine.
VENTING INSTRUCTIONS must be observed without fail.