Water Pump: Service and Repair

11 51 000 Removing and installing/renewing coolant pump (N54, N54T)





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

Aluminium screws/bolts are permitted with and without colour 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
^ Remove front right cross piece





Release coolant hose (1).

Release coolant hose (3).

Disconnect plug connection (2).

Release screws (5).

Installation note:
Replace aluminium screws.

Tightening torque 11 51 1AZ.

Installation note:
If a coolant pump is reused, it must be mechanically rotated once (breakaway torque at pump gears).

One coolant pump rotation will be sufficient.





Assemble engine.

Venting instructions must be observed without fail.