Replacing cylinder head gasket (S55 engine)

Special tools required:

11 4 430
11 4 470

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 the cylinder head gasket.

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

Make sure it is clean, dirt particles must not fall into the oil duct.

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

IMPORTANT: Only work on the sealing surface on the engine block and on the cylinder head with special tool 11 4 470.
Do not use any metal-cutting tools.
Illustration shows N52

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Check the fitting sleeves for damage and firm fit.

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The cylinder head gasket on the S55 is a beaded metal gasket.

Observe the identification.

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Assemble engine.