11 12 101 Replacing cylinder head gasket (N55)

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Special tools required:

IMPORTANT: Aluminum screws/bolts must be replaced each time they are released .
Aluminum screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminum screws/bolts are not magnetic .
Jointing torque and angle of rotation must be observed without fail (risk of damage) .

Necessary preliminary work:

Remove CYLINDER HEAD .
Check cylinder head for DEVIATION FROM FLATNESS .
Check cylinder head for WATERTIGHTNESS .

Remove cylinder head gasket.

Insert special tool 11 4 430 into feed pipe of oil pump.

Fig 1: Inserting Special Tool (11 4 430) Into Feed Pipe Of Oil Pump

G10041784

Courtesy of BMW OF NORTH AMERICA, INC.

Remove remnants of oil and dirt from blind holes (1).

IMPORTANT: Work on sealing surface on engine block and on cylinder head with special tool 11 4 470 only.
Do not use any metal-cutting tools.

Fig 2: Identifying Blind Holes

G10041785

Courtesy of BMW OF NORTH AMERICA, INC.

Check adapter sleeves (1) for damage and firm seating.

Fig 3: Identifying Adapter Sleeves

G10041786

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder head gasket N55 is a beaded metal gasket.

Fig 4: Identifying Cylinder Head Gasket (N55)

G10041787

Courtesy of BMW OF NORTH AMERICA, INC.

Place cylinder head gasket (2) in direction of arrow on engine block.

Fix new cylinder head gasket with fitting sleeves (1).

Fig 5: Removing Cylinder Head Gasket

G10041788

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.