Necessary preliminary work

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Remove left CYLINDER HEAD COVER
Remove FAN COWL with electric fan
Remove BELT PULLEY for air conditioning system
Remove left CHAIN TENSIONER

Mount special tool 11 9 900 at position of chain tensioner.

Preload hexagon socket screw with special tool 00 9 250 to 0.6 Nm.

NOTE: Graphic corresponds to cylinders 1-4.

Fig 1: Preloading Hexagon Socket Screw With Special Tool 00 9 250 To 0.6 Nm

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Marking (MP = Mounting Position) is important for installing special tool 11 8 570 .