11 12 729 Checking cylinder head for watertightness (N20, N26)

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.

NOTE: The special tools 11 4 342 and 11 4 344 are included in the set of special tools 11 4 340 .

Necessary preliminary tasks:

Fit special tool 11 4 342 with screws (1). Screw in knurled screw in direction of arrow.

Sealing flange must rest flat.

Fig 1: Fitting Special Tool (11 4 342) With Screws

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Fit special tool 2 212 824 .

Installation note:

Secure special tool with maximum 20 Nm.

Order number: 83 30 2 212 824

Fig 2: Identifying Special Tool (83 30 2 212 824)

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

NOTE: Compressed air at valve max. 3 bar .

Heat cylinder head to 60 °.

Check for bubble formation in a water bath.

Fig 3: Securing Special Tool (11 4 344) With Screws

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Assemble engine.