Water Pump: Service and Repair

11 51 000 Removing and installing/renewing coolant pump (S63)





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.





Important!
If a coolant 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:
^ Drain coolant
^ Remove drive belt
^ Remove fan cowl
^ Remove supplementary coolant pump.





Unlock and detach plug connections (1).

Unlock and detach all coolant hoses on coolant pump.

Unfasten screws (2).

Tightening torque 11 51 1AZ.

Lift out coolant pump with a swivelling movement.

Installation:
Replace seal.





Note:
Remove coolant thermostat from faulty coolant pump.

Convert coolant thermostat to new coolant pump.

Tightening torque 11 53 1AZ.

Installation:
Replace sealing ring.

Assemble engine.

Vent cooling system and check for water leaks.