18 40 050 Removing And Installing/Replacing Front Exhaust Manifold (N53/N52/N52K/N51)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 128i, and 2009 BMW 128i. However, it is still accessible from the selected car via links, so may be relevant.
Necessary preliminary tasks:
- Remove rear exhaust manifold . See EXHAUST MANIFOLD WITH
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 monitor sensor from cylinders 1 to 3.
Tightening torque. See 11 78 1AZ in EMISSION CONTROL OXYGEN SENSOR .
Unscrew nuts.
Remove exhaust manifold (1).
Installation:
Clean sealing faces and replace seals.
Replace nuts.
Tightening torque. See 18 40 1AZ in 18 40 EXHAUST MANIFOLD .