18 40 040 Removing and installing, sealing/replacing exhaust manifold (N47 D20 O 1)

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Risk of burning!
Only perform this repair work on an engine that has cooled down.

Necessary preliminary tasks:

Remove EXHAUST TURBOCHARGER .

Release screws (1).

Tightening torque: 11 71 1AZ .

Do not release screws (2).

Fig 1: Identifying Exhaust Manifold Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Slacken nut (1).

Tightening torque: 18 31 5AZ .

Unfasten banjo bolt (2).

Tightening torque: 13 62 7AZ .

Replace sealing rings.

IMPORTANT: To ensure operational reliability, use stainless steel sealing washers.

Set exhaust pressure pipe onto its side.

Release screw (3).

Tightening torque: 18 31 6AZ .

Remove heat shield (4).

Fig 2: Identifying Heat Shield, Banjo Bolt And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Release nuts along dashed line (1).

Tightening torque: 11 62 1AZ .

Remove exhaust manifold (2) from cylinder head.

Installation note:

Clean connection points.

Replace gaskets.

Fig 3: Identifying Exhaust Manifold

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Manifold gaskets are graphite-coated on one side!

The graphite coating must be fitted on the manifold side.

Fig 4: Locating Manifold Gaskets

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check function of DDE.