Turbocharger Coolant Pump: Service and Repair

11 53 000 Removing And Installing/Replacing Supplementary Coolant Pump For Exhaust Turbocharger (N63)







WARNING:
Risk of scalding.
Only perform this work after engine has cooled down.







Recycling:
Catch and dispose of drained coolant in a suitable collecting vessel.
Observe country-specific waste disposal regulations.







Necessary preliminary work:
- Remove charge air cooler expansion tank







Unclip coolant hose (1) from bracket (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 auxiliary water pump (3).
Cover surrounding components and plug connections with suitable apparatus

Release hose clamp (5) with a suitable tool.

Installation note:
Replace hose clamp (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 note:
Plug connection (2) must snap audibly into place.

Lift out auxiliary water pump (1).
Release holder (3) from auxiliary water pump (1).







Assemble engine.
Top up coolant.
Venting instructions must be observed without fail.