11 12 729 Checking cylinder head for water leaks (N52K)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 BMW 528xi, 2010 BMW 528i, 2009 BMW 528xi, 2009 BMW 528i, and 2008 BMW 528xi. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

11 4 341
11 4 342
11 4 344
11 4 345

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:

Remove CYLINDER HEAD
Disassemble CYLINDER HEAD

NOTE: Observe mounting of special tool 11 4 341 on cylinder.
Secure special tool 11 4 341 with bolts 11 4 345 to 25 Nm.

Fig 1: Identifying Cylinder Block Mark

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Install special tool 11 4 341 with special tool 114345 .

Installation:

Cylinder no. 1 is marked.

Fig 2: Identifying Special Tool 11 4 341

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

Sealing flange must rest flat.

Fig 3: Identifying Special Tool 11 4 342 With Bolts

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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: Securing Special Tool 11 4 344 With Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.