11 12 729 Checking cylinder head for watertightness (N54, N54T)

Special tools required:

IMPORTANT: Pressure-test cylinder head to max. 3 bar .
Heat cylinder head to 60 °.
Check for bubble formation in a water bath.

Necessary preliminary tasks

NOTE: Observe mounting of special tool 11 4 341 on cylinder no. 1

Secure special tool 11 4 341 using bolts 11 4 345 tightened to 25 Nm

Fig 1: Mounting Special Tool (11 4 341) On Cylinder

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Extend special tool 11 4 341 with special tool 11 4 345 .

Installation note:

1 cyl is marked.

Fig 2: Identifying Extend Special Tool (11 4 341)

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Fit special tool 11 4 342 with bolts (1), insert knurled screw in direction of arrow.

Sealing flange must rest flat.

Fig 3: Fitting Special Tool (11 4 342)

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Secure special tool 11 4 344 with screws (1).

NOTE: Compressed air at valve (2) must not exceed 3 bar .
Heat cylinder head to 60 °.
Check for bubble formation in a water bath.

Fig 4: Securing Special Tool (11 4 344)

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Assemble engine.