With replacement of the cylinder head cover: Remount both sprocket position sensors on the left

Remounting the two camshaft position sensors on the left 

• Loosen screw (1)  .
• Remove the camshaft position sensor (2)  .
• Loosen screw (3)  .
• Remove the camshaft position sensor (4)  .

  Courtesy of BMW OF NORTH AMERICA, INC.

• Replace the sealing rings at the camshaft position sensors and coat with lubricant.

  Parts:  Sealing ring

• Install the camshaft position sensor (2)  of the intake camshaft on the left.
• Tighten down screw (1)  .

  Courtesy of BMW OF NORTH AMERICA, INC.

  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Camshaft position sensor to cylinder head cover
  Torx screw M6	Tightening torque	8 Nm

• Install the left camshaft position sensor (4)  of the exhaust camshaft.
• Tighten down screw (3)  .

Remove the left check valve 

• Loosen screws (1)  .
• Remove the check valve (2)  in the arrow direction.

Courtesy of BMW OF NORTH AMERICA, INC.

Installing the left non-return valve 

• Ensure that no loose parts are present in the opening (1)  of the cylinder head cover.

  Courtesy of BMW OF NORTH AMERICA, INC.

• Install the check valve (2)  against the arrow direction.
• Tighten down screws (1)  .

Courtesy of BMW OF NORTH AMERICA, INC.