Removing and Installing/Replacing Feed Line

11 53 740 - Removing and installing/replacing feed line (N54)





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:
- Drain coolant Service and Repair
- Remove both catalytic exhaust-gas converters





Unfasten hose clip (1).
Tightening torque 11 51 4AZ [1][2]11 51 Coolant Pump with Drive.
Detach coolant hose of feed line in direction of arrow from coolant pump (2).





Important!
Risk of damage!
Where necessary, to release the coolant feed lines (3 and 4), do not place pliers on the pipes.

Release screws (1 and 2).

Tightening torque 11 53 10AZ 11 53 Thermostat and Connections.
If necessary, release coolant feed lines (3 and 4) with suitable pliers at connection.

Installation Note:
Replace O-rings.





Note:
For purposes of clarity, the graphic shows the released coolant feed lines removed.

Release screws (1).

Tightening torque 11 53 3AZ 11 53 Thermostat and Connections.
Remove feed line (2).

Installation Note:
Replace seal.





Assemble engine.
Top up coolant Service and Repair.
Venting instructions Venting Cooling System and Checking for Water Leaks must be observed without fail.