11 53 740 Removing and installing/replacing feed line (N54, N54T)

WARNING: This page is about a different car, the 2013 BMW Z4, 2012 BMW Z4, 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

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 tasks:

Drain COOLANT
Remove both catalytic exhaust-gas converters. See 1832050 REMOVING AND INSTALLING/REPLACING CATALYTIC EXHAUST-GAS CONVERTER FOR CYLINDERS 1-3 (N54) or 1832060 REMOVING AND INSTALLING/REPLACING CATALYTIC EXHAUST-GAS CONVERTER FOR CYLINDERS 4-6 (N54) .

Unfasten hose clip (1).

Tightening torque 11 51 4AZ .

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

Fig 1: Disconnecting Coolant Hose From 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 11 53 10AZ .

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

Installation note:

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 11 53 3AZ .

Remove feed line (2).

Installation note:

Replace seal.

Fig 3: Identifying Feed Line With Mounting Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Top up COOLANT .

BLEEDING INSTRUCTIONS must be observed without fail.