Install all roller cam followers

• Observe the classification of roller cam followers.

  The classification in digits from 1 to 5 has been printed on the roller cam follower.

  Classification	Idle speed
  1	Repair case - slow engine speed when idling
  2	Installed as standard/Initial installation
  3	Installed as standard/Initial installation
  4	Installed as standard/Initial installation
  5	Repair case - high engine speed when idling

  Courtesy of BMW OF NORTH AMERICA, INC.

• Install the roller cam follower (1)  on the intake side.
• Make sure that the roller cam follower (1)  is correctly positioned on the hydraulic valve clearance compensating element (arrows) and the intake valves.

  Courtesy of BMW OF NORTH AMERICA, INC.

• Install the roller cam follower (1)  on the exhaust side.
• Make sure that the roller cam follower (1)  is positioned correctly on the hydraulic valve clearance compensating elements (arrows) and the exhaust valves.

  Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work 

• Refer to INSTALLING EXHAUST CAMSHAFT .
• Refer to INSTALLING INTAKE CAMSHAFT .
• Refer to ADJUSTING THE CAMSHAFTS WITH THE SPECIAL TOOL .
• Refer to INSTALLING THE INTAKE ADJUSTER .
• Refer to INSTALLING THE VANOS CENTRAL VALVE OF THE INTAKE ADJUSTER .
• Refer to INSTALLING EXHAUST CAMSHAFT ADJUSTER .
• Refer to INSTALLING THE VANOS CENTRAL VALVE OF THE EXHAUST CAMSHAFT ADJUSTER .
• Refer to PRE-TENSIONING THE TIMING CHAIN WITH THE SPECIAL TOOL .
• Refer to TIGHTENING THE VANOS CENTRAL VALVE OF THE EXHAUST CAMSHAFT ADJUSTER .
• Refer to TIGHTENING THE VANOS CENTRAL VALVE OF THE INTAKE ADJUSTER .
• Refer to DISASSEMBLING ALL SPECIAL TOOLS .
• Refer to INSTALLING CHAIN TENSIONER .
• Refer to CHECKING THE TIMINGS OF THE CAMSHAFT .
• Refer to IF INSTALLED: SECURING THE ENGINE OIL COOLER .
• Refer to CHECKING THE INTERMEDIATE LEVER CLASSIFICATION .
• Refer to INSTALLING ALL INTERMEDIATE LEVERS .
• Refer to INSTALLING ALL GATES .
• Refer to CHECKING THE POSITION OF THE INTAKE CAMSHAFT .
• Refer to CHECKING THE POSITION OF THE INTAKE CAMSHAFT AT CYLINDER 3 AND 4 .
• Refer to INSTALLING TORSION SPRINGS .
• Refer to INSTALLING THE INTAKE PLENUM .
• Refer to INSTALLING THE TANK VENT VALVE .
• Refer to INSTALLING CONTROL UNIT BRACKET .
• Refer to INSTALLING THE INTEGRATED POWER SUPPLY MODULE (PDM) .
• Refer to INSTALLING THE DME CONTROL UNIT .
• Refer to INSTALLING CYLINDER HEAD COVER .
• Refer to INSTALLING BOTH ACTUATORS .
• Refer to INSTALLING HIGH PRESSURE PUMP .
• Refer to PREPARING THE INJECTORS FOR INSTALLATION .
• Refer to INSTALLING THE HIGH-PRESSURE RAIL WITH INJECTORS OF THE CYLINDERS 4 TO 6 .
• Refer to INSTALLING THE HIGH-PRESSURE RAIL WITH INJECTORS OF THE CYLINDERS 1 TO 3 .
• Refer to INSTALLING THE HIGH-PRESSURE LINE BETWEEN THE HIGH-PRESSURE PUMP AND THE HIGH-PRESSURE RAIL .
• Refer to INSTALLING FUEL DELIVERY LINE .
• Refer to INSTALLING ALL SPARK PLUGS .
• Refer to INSTALLING ALL IGNITION COILS .
• Refer to INSTALLING FAN COWL .
• Refer to INSTALLING INTAKE FILTER HOUSING .
• Refer to INSTALLING THE REAR TOP CROSS CONNECTION .
• Refer to INSTALLING UPPER CROSS CONNECTION .
• Refer to INSTALLING FRONT-END STRUT ON LEFT AND RIGHT .
• Refer to IF INSTALLED: INSTALLING THE COVER IN THE ENGINE COMPARTMENT AT TOP LEFT AND RIGHT (PARTIALLY REMOVED) .
• Refer to INSTALLING THE COVER FOR CENTER ENGINE COMPARTMENT .
• Refer to INSTALLING THE FRONT HOOD SEAL .
• Refer to RECONNECTING ALL BATTERY GROUND LEADS .
• Refer to ACTIVATING THE 48 V ELECTRICAL SYSTEM .
• Refer to FILLING AND VENTING THE LOW-TEMPERATURE COOLANT CIRCUIT .
• Refer to INSTALLING CENTER FIREWALL LOWERING PART .
• Refer to INSTALLING ACOUSTIC COVER AT REAR .
• Refer to INSTALLING THE CENTER COWL UPPER PART .
• Refer to INSTALLING WINDSHIELD PANEL COVER .
• Refer to INSTALLING THE COVER OF THE ENGINE COMPARTMENT ON THE REAR LEFT .
• Refer to INSTALLING THE REAR RIGHT ENGINE COMPARTMENT COVER .
• Refer to INSTALLING LEFT AND RIGHT WIPER ARM .
• Refer to INSTALLING ACOUSTIC COVER .
• Refer to INSTALLING THE REAR HOOD SEAL .
• Refer to IF INSTALLED: INSTALLING UNDERBODY PROTECTION FOR THE STEERING .
• Refer to INSTALLING THE UNDERBODY PROTECTION OF THE STEERING GEAR .
• Refer to INSTALLING FRONT UNDERBODY PROTECTION .
• Refer to INSTALLING UNDERBODY PROTECTION AT REAR .
• Refer to CHECKING ENGINE OIL LEVEL .
• Refer to TAKING HOOD OUT OF THE SERVICE POSITION .