Necessary preliminary tasks

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Remove 11 12 000 Removing and installing/sealing cylinder head cover (N52K)
Check 11 31 005 Checking timing of camshaft(s) (N52K)

IMPORTANT: Install special tool 11 4 280 to release the central bolts on the inlet and exhaust adjustment units and camshafts.

Fit special tool 11 4 283 with screws (1).

Fit special tool 11 4 281 on special tool 11 4 283.

IMPORTANT: Fit special tool 11 4 282 underneath on side of inlet camshaft.

Fig 1: Identifying Special Tools Fitted To Camshaft And Cylinder Head

Courtesy of BMW OF NORTH AMERICA, INC.

Release chain tensioner (2).

Tightening torque 11 31 6AZ .

Release central bolts on inlet and exhaust adjustment units (1).

Tightening torque 11 36 1AZ .

Installation: