The maintenance - Ford Focus
 Introduction
 2. Engines
 3. System of greasing of the engine
 4. Cooling system
 5. The power supply system
 6. Management of the power unit and the fulfilled gases
- 7. Ignition system
    7.1. The general data
   7.2. The ignition coil
   - 7.3. Spark plugs
      7.3.1. Kalilnoe number
      7.3.2. The backlash between electrodes increases in operation
      7.3.3. Definition of work of the engine on appearance of a candle
    7.4. Work with ignition system
 8. Coupling
 9. A transmission
 10. A drive of forward wheels
 11. A forward suspension bracket
 12. A back suspension bracket
 13. A steering
 14. Brake system
 15. An electric equipment
 16. System of release of the fulfilled gases
 17. Wheels and tyres
 The appendix
 Schemes of electric connections

Ford Fokus>> Ignition system>> Spark plugs>> The backlash between electrodes increases in operation
Along with correct калильным number (the tab. Candles for car Ford Focus engines see) spark plugs should have a demanded backlash between electrodes for each candle. It makes for new candles about 1,3 mm, but increases in process of operation.
At replacement of candles pay attention to that on your car candles with ordered калильным the number demanded by a backlash and the corresponding carving have been established only.