11 12 729 Checking cylinder head for water leaks (N55)

WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

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 tasks:

Remove CYLINDER HEAD .
Disassemble cylinder head . See 11 34 552 REMOVING AND INSTALLING/REPLACING ALL VALVES (N55) , 11 31 028 REMOVING AND INSTALLING/REPLACING EXHAUST CAMSHAFT (N55) or 11 31 025 REMOVING AND INSTALLING/REPLACING INTAKE CAMSHAFT (N55) .

Fit special tool 11 7 190 .

Installation note:

Secure special tool to 15 Newton meters.

Fig 1: Fitting Special Tool 11 7 190

Courtesy of BMW OF NORTH AMERICA, INC.

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

Sealing flange must rest flat.

Fig 2: Fitting Special Tool 11 4 342 With Screws

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 3: Securing Special Tool 11 4 344 With Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.