BMW 7 Series: Ignition Wires, Spark Plugs
REPLACING ALL SPARK PLUGS (N54, N63, N74)
Necessary preliminary tasks
- Switch off ignition.
- Remove IGNITION COILS.
IMPORTANT: Wear safety goggles.
Oil and dirt particles may get into your eyes!
Clean spark plug slot with compressed air.
Unscrew spark plugs with special tool 12 1 220 and extension with min. 8º bend.
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Fig. 14: Unscrewing Spark Plugs With Special Tool (12 1 220)
Attach new spark plug (1) to special tool 12 1 230.
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Fig. 15: Attaching Spark Plug To Special Tool (12 1 230)
Screw spark plug with special tool 12 1 230 hand-tight into cylinder head plug thread as far as it will go.
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Fig. 16: Screwing Spark Plug With Special Tool (12 1 230)
Installation note: Tighten spark plugs with torque wrench, special tool 12 1 220 and extension with min. 8º bend.
Observe tightening torque.
Tightening torque 12 12 2AZ.
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Fig. 17: Tightening Spark Plugs With Torque Wrench, Special Tool (12 1 220)
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Ignition Coil
NOTES ON CHECKING IGNITION SYSTEM
Troubleshooting
Fault in fuel injection system
Spark plug faults
Ignition coil faults
Further fault patterns with evaluation
Additional fault notes for troubles
Coding Control Module (DME/DDE)
Switch off ignition.
Connect MoDiC or DIS/GT1 Tester.
Switch on ignition.
Select "Coding" program.
For subsequent procedure, follow instructions in MoDiC or DIS/GT1 Tester.
Carry out adjustment of
SEE MORE:
Workshop Equipment
Minimum workshop equipment requirements in order to ensure the correct and
expert performance of body
repairs:
The tools listed below must be used.
All repair stages:
TOOL SPECIFICATION
Repair stage 1:
TOOL SPECIFICATION
Repair stage 2:
TOOL SPECIFICATION
Repair stage 3:
TOOL SPECIFICATION
IMP
Throttle And Operation
REMOVING AND INSTALLING/SEALING LEFT THROTTLE VALVE ASSEMBLY (N63)
Necessary preliminary tasks
Switch off ignition.
Remove left INTERCOOLER.
Unlock plug (1) and remove.
Unfasten screws (2).
Tightening torque 13 54 1AZ.
Remove throttle valve assembly (3).
Installation:
Check plug connection (
