Home >> BMW >> 2021 >> 840i xDrive 2D Convertible >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Cylinder Head -- Repair (G14, G15, & G16) (1 Of 7) >> 11 12 Cylinder Head >> 11 12 100 Removing and installing cylinder head (840i xDrive coupe, 840i xDrive Gran Coupe sedan) >> Seal the oil duct