Checking the VANOS adjuster of cylinder bank 1

Preliminary work 

• Refer to DISCONNECTING ALL BATTERY GROUND LEADS .
• Refer to REMOVING THE LEFT AND RIGHT UNDERSHIELD (TANK COVER) .
• Refer to REMOVING THE REAR LEFT AND RIGHT TENSION STRUT .
• Refer to REMOVING THE LEFT AND RIGHT REAR DIFFUSER .
• Refer to REMOVING THE STIFFENING PLATE .
• Refer to REMOVING EXHAUST SYSTEM .
• Refer to REMOVING THE FRONT UNDERBODY PROTECTION .
• Refer to REMOVING THE ACOUSTIC COVER .
• Refer to REMOVING LEFT OXYGEN CONTROL SENSOR .
• Refer to REMOVING RIGHT OXYGEN CONTROL SENSOR .
• Refer to REMOVING SUSPENSION STRUT BRACE .
• Refer to REMOVING RIGHT SUSPENSION STRUT BRACE .
• Refer to REMOVING INTAKE SILENCER HOUSING .
• Refer to REMOVING THE TOP LEFT COVER IN THE ENGINE COMPARTMENT , and REMOVING THE TOP RIGHT COVER IN THE ENGINE COMPARTMENT .
• Refer to REMOVING UPPER CROSS CONNECTION .
• Refer to REMOVING THE TENSION STRUT AT THE SHOCK TOWER ON THE LEFT AND RIGHT .
• Refer to REMOVING THE REAR TOP CROSS CONNECTION .
• Refer to REMOVING THE LEFT UNFILTERED-AIR DUCT .
• Refer to REMOVING FAN COWL .
• Refer to DRAINING THE COOLANT FOR THE LOW-TEMPERATURE COOLANT CIRCUIT .
• Refer to RELEASING LEFT CHARGE AIR LINE PARTIALLY .
• Refer to PARTIALLY RELEASING THE RIGHT CHARGE AIR LINE .
• Refer to REMOVING LEFT CLEAN AIR PIPE .
• Refer to REMOVING RIGHT CLEAN AIR PIPE .
• Refer to REMOVING THE COOLANT EXPANSION TANK FOR THE LOW-TEMPERATURE COOLANT CIRCUIT .
• Refer to REMOVING DRIVE BELT .
• Refer to REMOVING THE BELT PULLEY ON THE TORSIONAL VIBRATION DAMPER .
• Refer to REMOVING LEFT CHARGE AIR COOLER .
• Refer to REMOVING RIGHT CHARGE AIR COOLER .
• Refer to REMOVING GUIDE TUBE FOR OIL DIPSTICK .
• Refer to REMOVING COVER FOR THE RIGHT DME CONTROL UNIT .
• Refer to REMOVING THE RIGHT UNFILTERED-AIR DUCT .
• Refer to REMOVING THE RIGHT OXYGEN SENSOR MONITOR .
• Refer to RELEASING THE HEAT PROTECTION WIRE RING OF THE LEFT OXYGEN SENSOR MONITOR .
• Refer to REMOVING THE RIGHT-HAND ENGINE VENTILATION LINE AND THE CRANKCASE VENTILATION INTAKE PIPE .
• Refer to REMOVING THE LEFT ENGINE VENTILATION LINE .
• Refer to REMOVING UPPER HEAT SHIELD .
• Refer to RELEASING SCREW BETWEEN THE LEFT AND RIGHT HEAT SHIELD .
• Refer to REMOVING THE LEFT HEAT SHIELD .
• Refer to REMOVING RIGHT HEAT SHIELD .
• Refer to REMOVING THE CATALYTIC CONVERTER FOR CYLINDERS 1 TO 4 .
• Refer to REMOVING THE IGNITION COILS OF CYLINDERS 1 THROUGH 4 .
• Refer to REMOVING THE IGNITION COIL FROM CYLINDER 5 .
• Refer to PARTIALLY UNDOING WIRING HARNESS FROM RIGHT CYLINDER HEAD COVER .
• Refer to REMOVING RIGHT RAIL .
• Refer to REMOVING FUEL DELIVERY LINE .
• Refer to REMOVING RIGHT HIGH-PRESSURE PUMP .
• Refer to REMOVING THE INJECTORS FOR CYLINDERS 1 TO 4 .
• Refer to REMOVING VANOS SOLENOID ACTUATOR, EXHAUST OF CYLINDER BANK 1 .
• Refer to REMOVING THE VANOS SOLENOID ACTUATOR INTAKE OF CYLINDER BANK 1 .
• Refer to REMOVING RIGHT CYLINDER HEAD COVER .
• Refer to REMOVING THE SEALING CAP ON THE CYLINDER HEAD OF THE CYLINDER BANK 1 .

Check 

• Check the lock of intake adjuster and exhaust camshaft adjuster.
• Position the open-end wrench (1) on the hexagon of the camshafts.
• Move the open-end wrench back and forth a little in the arrow direction.

The camshafts must be connected with the VANOS adjusters (2) with frictional connections.

Courtesy of BMW OF NORTH AMERICA, INC.

Result 

» Camshafts are connected to the VANOS adjusters (2) with frictional connections.

Measure

• Continue the repair with the next step.

Result 

» If there is no frictional connection, the relevant adjuster must be replaced.

Measure

• Replace the affected VANOS adjuster.

Parts:  VANOS unit

Measure

• Check timing again.