BMW 7 Owners & Service Manuals

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.

Ignition Wires, Spark Plugs
Fig. 14: Unscrewing Spark Plugs With Special Tool (12 1 220)

Attach new spark plug (1) to special tool 12 1 230.

Ignition Wires, Spark Plugs
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.

Ignition Wires, Spark Plugs
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.

Ignition Wires, Spark Plugs
Fig. 17: Tightening Spark Plugs With Torque Wrench, Special Tool (12 1 220)

    READ NEXT:

     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

     Electronic Switching Or Control Units

     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:

     IBOC System/HD Radio

    The IBOC (In-Band- On-Channel) system is offered as the digital radio. With the introduction of the CIC, the control unit of the IBOC system has been integrated in the head unit as the IBOC decoder. The IBOC system enables the reception of HD (High Definition) radio through the FM/AM double tune

     Coolant

    General information Coolant consists of water and additives. Not all commercially available additives are suitable for the vehicle. Do not mix additives of different colors. Observe the water - additive mixing ratio of 50:50. Information about suitable additives is available from a dealer's service

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