11 12 729 Checking cylinder head for watertightness (N20)

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Special tools required:

11 4 340 .
2 212 824 .
83 30 2 212 824

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:

Remove CYLINDER HEAD .
Disassemble cylinder head. See REMOVING/INSTALLING INTAKE CAMSHAFT , REMOVING/INSTALLING EXHAUST CAMSHAFT , and REMOVING/INSTALLING ALL VALVES .

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

Sealing flange must rest flat.

Fig 1: Identifying Special Tool (11 4 342)

G04751057

Courtesy of BMW OF NORTH AMERICA, INC.

Fit special tool 2 212 824 .

Installation note:

Secure special tool with maximum 20 Nm.

Order number: 83 30 2 212 824

Fig 2: Fitting Special Tool (2 212 824)

G09919225

Courtesy of BMW OF NORTH AMERICA, INC.

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: Identifying Special Tool (11 4 344)

G04751058

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.