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

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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 11 31 028 REMOVING AND INSTALLING/REPLACING EXHAUST CAMSHAFT (N20/N26) , 11 34 552 REMOVING AND INSTALLING/REPLACING ALL VALVES (N20, N26) and 11 31 025 REMOVING AND INSTALLING/REPLACING INTAKE CAMSHAFT (N20/N26)

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

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: Special Tool (83 30 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: Special Tool (11 4 344) With Screws

G04751058

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.