18 40 060 Removing And Installing/Replacing Rear Exhaust Manifold (N53/N52/N52K/N51)
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Necessary preliminary tasks:
- Remove underbody protection . See 51 47 490 REMOVING AND INSTALLING/REPLACING FRONT UNDERBODY PROTECTION or 51 47 491 REMOVING AND INSTALLING/REPLACING REAR UNDERBODY PROTECTION .
- Remove complete exhaust system . See 18 00 020 REMOVING AND INSTALLING/REPLACING COMPLETE EXHAUST SYSTEM (N52/N52K/N51) .
- Remove lower section of microfilter housing .
- Remove engine cover .
NOTE:
The oxygen sensors are in danger of being damaged when the exhaust manifolds are removed and installed.
Remove control sensor from cylinders 4 to 6.
Remove monitor sensor from cylinders 4 to 6.
Installation:
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 .