11 12 729 Checking cylinder head for watertightness (N54, N54T)

WARNING: This page is about a different car, the 2016 BMW Z4, 2015 BMW Z4, and 2014 BMW Z4. 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 .

NOTE: Observe mounting of special tool 11 4 341 on cylinder no. 1

Secure special tool 11 4 341 using bolts 11 4 345 tightened to 25 Nm

Fig 1: Locating Cylinder Head Mounting

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

Installation note:

1 cyl is marked.

Fig 2: Marking Cylinder Head Using Special Tool (11 4 341)

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

Sealing flange must rest flat.

Fig 3: Inserting Knurled Screw Into Special Tool (11 4 342)

Secure special tool 11 4 344 with screws (1).

NOTE: Compressed air on the valve (2) at maximum 3 bar .

Heat cylinder head to 60 °.

Check for bubble formation in a water bath.

Fig 4: Securing Special Tool (11 4 344) Using Screws

Assemble engine.