1112729 Checking cylinder head for leaks (N51)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2010 BMW 328xi, 2010 BMW 328i, and 2009 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

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 .
Remove ALL ENGINE VALVES .

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.

Installation:

1 cyl is marked.

Fig 1: Removing Cylinder Head

G04751056

Courtesy of BMW OF NORTH AMERICA, INC.

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

Sealing flange must rest flat.

Fig 2: Inserting Knurled Screw

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 3: Identifying Special Tool (11 4 344)

G04751058

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.