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

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2010 BMW X5, 2010 BMW X3, 2009 BMW X5, 2009 BMW X3, and 2008 BMW X5. 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, see 11 12 100 Removing and installing cylinder head (N52K) .
Disassemble cylinder head, see 11 34 560 Replacing all valve stem seals (N52K) .

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: Cylinder Head

G04751055

Courtesy of BMW OF NORTH AMERICA, INC.

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

Installation:

Cylinder no. 1 is marked.

Fig 2: Special Tool (11 4 341)

G04751056

Courtesy of BMW OF NORTH AMERICA, INC.

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

Sealing flange must rest flat.

Fig 3: Special Tool (11 4 342) With Bolts

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: Special Tool (11 4 344) With Bolts

G04751058

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.