11 12 729 Checking cylinder head for watertightness (S65)

WARNING: This page is about a different car, the 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

11 5 230
11 5 231
11 5 235
11 5 237
11 9 961

See ENGINE - SPECIAL TOOLS .

NOTE: Special tool 11 5 230 can be used for both cylinder heads.

Necessary preliminary tasks:

Remove left cylinder head or 11 12 106 Removing and installing right cylinder head (S65) .
Disassemble cylinder head.

Secure special tool 11 5 231 with old cylinder head bolts.

Secure special tool 11 5 235 with special tool 11 5 237 .

NOTE: Picture shows S85.

Fig 1: Identifying Special Tools (11 5 231), (11 5 235) And (11 5 233)

Courtesy of BMW OF NORTH AMERICA, INC.

Secure special tool 11 9 961 with special tool 11 5 237 to 10 Nm.

Fig 2: Identifying Special Tool 11 9 961 And Cylinder Head Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Immerse cylinder head in a water bath.
Test pressure: 4.5 bar.
Check cylinder head for escaping air (cracks).
If necessary, add cleaning agent to water bath.

Assemble engine.