11 12 729 Checking cylinder head for watertightness (S65)

WARNING: This page is about a different car, the 2011 BMW M3, 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.

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

Necessary preliminary tasks:

Remove cylinder head See 1112105 REMOVING AND INSTALLING LEFT CYLINDER HEAD (S65) or 1112106 REMOVING AND INSTALLING RIGHT CYLINDER HEAD (S65) .
Disassemble cylinder head . See 1134552 REMOVING AND INSTALLING/REPLACING ALL VALVES (S65) , 1134715 REPLACING ALL VALVE SPRINGS (S65) or 1134560 REPLACING ALL VALVE STEM SEALS (S65) .

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 5 235 And 11 5 237)

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)

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.