11 12 501 Replacing cylinder head gasket (N47 D20 O1)

Necessary preliminary work:

The cylinder head gasket is designed as a beaded metal gasket.

Pay attention to gasket thickness (1).

Fig 1: Identifying Cylinder Head Gasket Thickness

Courtesy of BMW OF NORTH AMERICA, INC.

Highest piston protrusion at measuring points (1 and 2) of all 4 pistons determines thickness of cylinder head gasket.

Piston protrusion up to 0.92 mm

Piston protrusion >0.92... 1.03 mm

Piston protrusion greater than >1.03... 1.18 mm

Install 3 hole cylinder head gasket.

Fig 2: Identifying Thickness Marking
Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.