18 40 050 Removing and installing/replacing front exhaust manifold (N52T)

Necessary preliminary work:

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

Remove CONTROL SENSOR from cylinders 1 to 3.

Remove MONITORING SENSOR from cylinders 1 to 3.

Unscrew nuts.

Remove exhaust manifold (1).

Installation note:

Clean sealing surfaces and replace seals.

Replace nuts.

Tightening torque: 18 40 1AZ .

Fig 1: Locating Exhaust Manifold Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check exhaust system for leak tightness.