Removing and Installing Mixer For Exhaust System

18 31 140 Removing and installing mixer for exhaust system (M57T2 with SCR)

Special tools required:







WARNING:
Risk of burning.
Only perform this repair work after engine has cooled down.







IMPORTANT:
Ensure adequate ventilation in the workbay.
Avoid skin contact (wear gloves).
Avoid eye contact (safety goggles).
Urea/water mixture can escape when components carrying urea/water mixture are released. Have a collecting vessel ready.
Observe country-specific waste disposal regulations.







IMPORTANT:
Maintain conditions of absolute cleanliness.
Connections and covers of lines carrying urea/water mixture must be cleaned thoroughly with water after each removal or before each installation.
Thoroughly clean the working area with water after repair work.
Use fluff-free cloths for cleaning (see ETP Electronic Parts Catalogue WAYPALL L20 cleaning cloths).
Seal off connections and lines with special tool 16 1 130.
Thoroughly clean special tool with water after each use.







Necessary preliminary tasks:
- Remove front pipe.







Remove mixer (1) from front pipe.
Replace gasket behind.







IMPORTANT: The mixer can be installed the wrong way round. The marked arrow must point in the exhaust gas direction of flow.







Installation note:
Check exhaust system for leak tightness.







After completing repair work:
Carry out SCR adjustment using BMW Diagnosis and Information System.
Refer to:
- Service function
- SCR systems
- Carry out activation and adjustments