Home >> BMW >> 2021 >> 740i >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine - Cylinder Head/Valve Cover (3 Of 6) - Repair (G12) >> 11 12 Cylinder Head, Valve Cover >> 11 12 105 Removing and installing the left cylinder head (750i 2016-2019) >> Preparing special tool 8.5 mm