11 12 729 Checking cylinder head for watertightness (N63)

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Special tools required:

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

See MAINTENANCE AND GENERAL INFORMATION - SPECIAL TOOLS .

See ENGINE - SPECIAL TOOLS (N54, N63) .

Necessary preliminary tasks:

Remove left cylinder head .
Remove right cylinder head .
Remove all valves .

NOTE: Special tool kit 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: Identifying 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 stages.

Tightening torque:25 Nm

Fig 2: Cylinder Head Bolts Tightening/Loosening Sequence

G06178422

Courtesy of BMW OF NORTH AMERICA, INC.

Remove vent screw (1).

Tightening torque: 11 12 8AZ, see CYLINDER HEAD WITH COVER

Installation:

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. Inspection pressure 4.0 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.