11 12 729 Check cylinder head for watertightness

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:

NOTE: Observe mounting of special tool 11 4 341 on 1 cylinder.
Secure special tool 11 4 341 with bolts 11 4 345 to 25 Nm.

Fig 1: Mounting Of Special Tool (11 4 341) On 1 Cylinder

Courtesy of BMW OF NORTH AMERICA, INC.

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

Installation note:

1 cyl is marked.

Fig 2: Identifying Special Tool (11 4 341)

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

Courtesy of BMW OF NORTH AMERICA, INC.

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

NOTE:

Compressed air at valve (2) must not exceed 3 bar.

Heat cylinder head to 60°.

Check for bubble formation in a water bath.

Fig 4: Securing Special Tool (11 4 344) With Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.