11 12 729 Checking cylinder head for leaks (N51)

WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2013 BMW 328xi, 2013 BMW 328i, 2012 BMW 328xi, 2012 BMW 328i, and 2011 BMW 328xi. 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
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:

Cylinder no. 1 is marked.

Fig 1: Special Tool (11 4 341) And Removal Direction

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 2: Special Tool (11 4 342) And 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 3: Special Tool (11 4 344) And Bolts

G04751058

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.