BMW 7 Series: Checking Cylinder Head For Watertightness (N63)
Necessary preliminary work
- Remove LEFT CYLINDER HEAD.
- Remove RIGHT CYLINDER HEAD.
- Remove ALL VALVES.
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.
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Fig. 44: Positioning Special Tool 11 8 081 On Cylinder Head
Insert special tool 11 8 083 and tighten in sequence (1 to 10) in several steps.
Tightening torque: 25 Nm
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Fig. 45: Identifying Special Tool 11 8 083 Tightening Sequence
Remove vent screw (1).
Tightening torque: 11 12 8AZ.
Installation note: Replace sealing ring.
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Fig. 46: Identifying Vent Screw
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).
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Fig. 47: Identifying Special Tool 11 8 082 Location
NOTE: If necessary, add cleaning agent to water bath.
Assemble engine.
GRINDING CYLINDER HEAD SEALING SURFACE (N63)
Necessary preliminary work
- Remove cylinder head. See LEFT CYLINDER HEAD and RIGHT CYLINDER HEAD.
Cylinder head disassembled
Check evenness of cylinder head lower face with a standard straightedge (1).
NOTE: Maximum deviation from flatness: longitudinal 0.10 mm.
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Fig. 48: Checking Evenness Of Cylinder Head Lower Face With Standard
Straightedge - Longitudinal
NOTE: Maximum deviation from flatness: transversal 0.05 mm.
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Fig. 49: Checking Evenness Of Cylinder Head Lower Face With Standard
Straightedge -
Transversal
NOTE: A cylinder head gasket (+REP) 0.3 mm thicker than usual can be obtained for machined (resurfaced) cylinder heads.
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Fig. 50: Identifying Cylinder Head Gasket (+REP)
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Removing And Installing Left Cylinder Head (N63)
Necessary preliminary work
Check TIMING
Remove left INLET AND EXHAUST ADJUSTMENT UNIT
Release screw (1).
NOTE: Guide rail is loose from cylinder head.
Fig. 51: Identifying Screw Of Guide Rail
Rel
Removing And Installing/Sealing Left Cylinder Head Cover (N63)
Necessary preliminary work
Remove ACOUSTIC COVER
Disconnect NEGATIVE BATTERY TERMINAL
Remove left CHARGE AIR COOLER
Remove INTAKE FILTER HOUSING
Remove EXPANSION TANK.
Remove coolant pipe from
Oil Sump
REMOVING AND INSTALLING/REPLACING LOWER OIL SUMP SECTION (N63)
Necessary preliminary work
Remove underbody protection at front and rear.
Release oil drain plug and drain engine oil. See SERVICE -
SEE MORE:
Drive, Heating/Ventilation/Air Conditioning
REPLACING FAN FOR THIGH SUPPORT ON FRONT SEAT
Necessary preliminary tasks
Remove padding for thigh support.
Remove separating net (1).
Lift out fan (2).
Fig. 51: Identifying Front Seat Thigh Support Fan And Separating Net
REPLACING FANS FOR BACKREST ON FRONT SEAT
Necessary preliminary tasks
Service Information
Calibration of the Drivers/front-Passenger Seat in the US Version
The position of the driver's seat in the longitudinal direction can become
implausible in the course of that seat's
life. This can be caused by repeatedly moving the seat forward and back in the
longitudinal direction.
These moveme
