Close the oil holes on the exhaust turbocharger

Preliminary work 

• Refer to REMOVING THE COVER FOR THE CENTER ENGINE COMPARTMENT .
• Refer to REMOVING THE ACOUSTIC COVER .
• Refer to REMOVING INTAKE SILENCER HOUSING .
• Refer to REMOVING THE RIGHT UNFILTERED-AIR DUCT .
• Refer to INSTALLING ENGINE VENTILATION LINE .
• Refer to REMOVING RIGHT CLEAN AIR PIPE .
• Refer to REMOVING FAN COWL .
• Refer to DRAINING THE COOLANT FOR THE CHARGE AIR COOLER .
• Refer to REMOVING RIGHT CHARGE AIR COOLER .
• Refer to REMOVING THE REAR DIFFUSER .
• Refer to REMOVING THE REAR AXLE COVER .
• Refer to IF INSTALLED: REMOVING THE TORSION STRUT ON THE RIGHT AND LEFT WHERE REQUIRED .
• Refer to REMOVING EXHAUST SYSTEM .
• Refer to REMOVING THE CATALYTIC CONVERTER FOR CYLINDERS 1 TO 4 .
• Refer to RELEASING THE CHARGE AIR HOSE FROM THE EXHAUST TURBOCHARGER OF THE CYLINDERS 1 TO 4 .
• Refer to RELEASING THE OIL FEED LINE FROM THE EXHAUST TURBOCHARGER OF THE CYLINDERS 1 TO 4 .
• Refer to RELEASING THE OIL FEED LINE FROM THE EXHAUST TURBOCHARGER OF THE CYLINDERS 1 TO 4 .
• Refer to LOOSENING THE BANJO BOLT FOR THE COOLANT RETURNING LINE AT THE EXHAUST TURBOCHARGER FOR CYLINDERS 1 TO 4 .
• Refer to REMOVING THE OIL RETURN LINE FROM THE OIL RETURN COVER OF CYLINDERS 1 TO 4 .
• Refer to DETACHING THE COOLANT FEED LINE ON THE EXHAUST TURBOCHARGER FOR CYLINDERS 1 TO 4 .

• Replace O-rings.

Parts:  O-ring

• Close the return orifices with the seal plugs 2 364 711 .

Courtesy of BMW OF NORTH AMERICA, INC.