18 40 020 Removing and installing/replacing right exhaust manifold (N62)

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Scalding hazard! Only perform these tasks on an engine that has cooled down.

Necessary preliminary tasks:

Remove right control sensor
Remove right monitor sensor
Remove complete exhaust system
Secure engine in installation position with special tool
E65 only:
Remove intake filter housing
Lower front axle support
E65 only:
Remove A/C compressor drive belt
Remove right engine support arm

Release screw connection of A/C compressor.

Place A/C compressor to one side and secure A/C system line so as to improve accessibility to nuts on exhaust manifold.

For purposes of clarity, nuts are shown on removed engine.

Release nuts on exhaust manifold.

Remove exhaust manifold towards bottom and pull out towards rear.

Fig 1: Removing Exhaust Manifold

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace seals.

Beads of seals face the exhaust manifold.

Fig 2: Identifying Exhaust Manifold Seals Beads Position

Courtesy of BMW OF NORTH AMERICA, INC.

Coat threads with copper paste.

Replace nuts.

Tightening torque, refer to 11 62 1AZ in EXHAUST SYSTEM - TIGHTENING TORQUES - 645CI .