11 12 729 Checking cylinder head on watertightness (S63)

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Special tools required:

11 8 080 .
11 8 081 .
11 8 083 .
11 8 082 .
00 9 250

Necessary preliminary tasks:

NOTE: Set of special tools 11 8 080 can be used for cylinder bank 1 to 4 and cylinder bank 5 to 8.

Position special tool 11 8 081 on cylinder head.

Fig 1: Positioning Special Tool (11 8 081) On Cylinder Head

G06178421

Courtesy of BMW OF NORTH AMERICA, INC.

Insert special tool 11 8 083 and tighten in sequence (1 to 10) in several steps.

Tightening torque: 25 Nm .

Graphic shows N63 .

Fig 2: Cylinder Head Bolts Tightening/Loosening Sequence

G06178422

Courtesy of BMW OF NORTH AMERICA, INC.

Remove vent screw (1).

Tightening torque: 11 12 7AZ .

Installation note:

Replace sealing ring.

Fig 3: Identifying Vent Screw

G06178423

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Max: 0.8 Nm.

Screw in special tool 11 8 082 with suitable tool and special tool 00 9 250 to 0.8 Nm.

Connect compressed air hose with pressure gauge.

Immerse cylinder head in a water bath. Test pressure: 3.0 bar.

Check cylinder head for escaping air (cracks).

Fig 4: Identifying Special Tool (11 8 082)

G06178424

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: If necessary, add cleaning agent to water bath.

Assemble engine.