Turbocharger Coolant Pump: Service and Repair

11 53 000 Removing and installing/replacing supplementary coolant pump for exhaust turbocharger (N63)





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.

Necessary preliminary tasks:
^ Remove intercooler expansion tank








Unclip coolant hose (1) from holder (3) and lay in direction of arrow to one side.

Unfasten screws (2).

Tightening torque 11 51 4AZ.





Important!
Risk of damage!
Coolant emerges when the coolant hoses are detached from the supplementary coolant pump (3).
Cover surrounding components and plug connections with suitable apparatus

Release hose clamp (5) with a suitable tool.

Installation:
Replace hose clip (5).

Detach coolant hose (4) and lay to one side.

Release hose clamp (1) with a suitable tool.

Detach coolant hose (2) and lay to one side.





Disconnect plug connection (2).

Installation:
Plug connection (2) must snap audibly into place!

Lift out supplementary coolant pump (1).

Release bracket (3) from supplementary coolant pump (1).





Assemble engine.

Top up coolant.

Venting instructions must be observed without fail.