11 53 740 Removing and installing/replacing feed line (N54, N54T)
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. See 17 00 008 DRAINING AND ADDING COOLANT (N54, N54T) .
- Remove both catalytic exhaust-gas converters . See 18 32 050 REMOVING AND INSTALLING/REPLACE CATALYTIC CONVERTER FOR CYLINDERS 1-3 (N54, N54T) or 11 65 024 REMOVING AND INSTALLING/REPLACE EXHAUST TURBOCHARGER FOR CYLINDERS 4-6 (N54, N54T)
Unfasten hose clamp (1).
Tightening torque: 11 51 4AZ .
Detach coolant hose of feed line in direction of arrow from coolant pump (2).
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.
Release screws (1).
Tightening torque: 11 53 3AZ .
Remove feed line (2).
Installation note:
Replace gasket.
Assemble engine.
Top up coolant. See 17 00 008 DRAINING AND ADDING COOLANT (N54, N54T) .
bleeding instructions must be observed without fail . See 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR WATERTIGHTNESS (N54) .