11 12 101 Replacing cylinder head gasket (N55)

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Special tools required:

IMPORTANT: Aluminium screws/bolts must be replaced each time they are released .
Aluminium screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminium 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 Oil Pump Feed Pipe

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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 Cylinder Head Gasket Blind Holes

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Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 3: Identifying Cylinder Head Gasket Adapter Sleeves

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Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder head gasket N55 is a beaded metal gasket.

Fig 4: Identifying Cylinder Head Gasket Mark (N55)

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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: Installing Cylinder Head Gasket

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Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.