18 40 050 Removing and Installing/Replacing Front Exhaust Manifold (N52K)

WARNING: This page is about a different variant/trim than selected.

Necessary preliminary tasks:

NOTE: The oxygen sensors are in danger of being damaged when the exhaust manifolds are removed and installed.

Remove control sensor, see 78 EMISSION CONTROL, OXYGEN from cylinders 1 to 3

Remove monitor sensor from cylinders 1 to 3

Unscrew nuts.

Remove exhaust manifold (1).

Fig 1: Locating Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Clean sealing faces and replace seals.

Replace nuts.

Tightening torque, 18 40 1AZ, see 18 40 EXHAUST SYSTEM SUSPENSION .

Fig 2: Locating Seal Beads

Courtesy of BMW OF NORTH AMERICA, INC.