11 51 000 Removing and installing/replacing water pump (N51)
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.
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
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 ELECTRIC WATER PUMP WITH DRIVE .
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.