11 12 729 Checking cylinder head for watertightness (N54)

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: Checking Cylinder Head For Water Leaks

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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 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) With Bolts

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

NOTE: Compressed air on the valve (2) at maximum 3 bar .
Heat cylinder head to 60 °.
Check for bubble formation in a water bath.

Fig 4: Identifying Special Tool (11 4 344) With Screws

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Assemble engine.