11 53 740 Removing and Installing/Replacing Feed Line

11 53 740 Removing and installing/replacing feed line (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.

Necessary preliminary work:
^ Drain coolant





^ Remove both catalytic exhaust gas converters





Unfasten hose clamp (1).

Tightening torque 11 51 4AZ.

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.

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.

Remove feed line (2).

Installation note:
Replace gasket.





Assemble engine.

Top up coolant.

Bleeding instructions must be observed without fail.