11 12 729 Checking cylinder head for water leaks (N52)

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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 work:

Remove CYLINDER HEAD .
Disassemble CYLINDER HEAD .

NOTE: Check special tool 11 4 341 is correctly attached to cylinder.

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

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

Installation:

Cylinder no. 1 is marked.

Fig 1: Identifying Cylinder 1 Marking

G04751055

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 2: Identifying Special Tool (11 4 341)

G04751056

Courtesy of BMW OF NORTH AMERICA, INC.

Sealing flange must rest flat.

Fig 3: Identifying Special Tool (11 4 342)

G04751057

Courtesy of BMW OF NORTH AMERICA, INC.

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

NOTE: Compressed air at valve max. 3 bar.

Heat cylinder head to 60 °.

Check for bubble formation in a water bath.

Fig 4: Identifying Special Tool (11 4 344)

G04751058

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.