11 53 740 Removing And Installing/Replacing Feed Line (N54)

WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.

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 . See 17 00 005 DRAINING AND ADDING COOLANT (N54) .
Remove both catalytic exhaust-gas converters . See 18 32 050 REMOVING AND INSTALLING/REPLACING CATALYTIC EXHAUST-GAS CONVERTER FOR CYLINDERS 1-3 (N54) or 18 32 060 REMOVING AND INSTALLING/REPLACING CATALYTIC EXHAUST-GAS CONVERTER FOR CYLINDERS 4-6 (N54) .

Unfasten hose clip (1).

Tightening torque. See 11 51 4AZ in 11 51 COOLANT PUMP WITH DRIVE .

Detach coolant hose of feed line in direction of arrow from coolant pump (2).

Fig 1: Detaching Coolant Hose Of Feed Line

Courtesy of BMW OF NORTH AMERICA, INC.

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. See 11 53 10AZ in THERMOSTAT AND CONNECTIONS .

If necessary, release coolant feed lines (3 and 4) with suitable pliers at connection.

Installation:

Replace O-rings.

Fig 2: Identifying Coolant Feed Lines And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

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

Release screws (1).

Tightening torque. See 11 53 3AZ in THERMOSTAT AND CONNECTIONS .

Remove feed line (2).

Installation:

Replace seal .

Fig 3: Identifying Feed Line With Mounting Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Top up coolant . See 17 00 005 DRAINING AND ADDING COOLANT (N54) .

Venting instructions must be observed without fail . See 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR WATER LEAKS (N54) .