Citroen Xantia

1. In the absence of factory marks on ВВ wires of spark plugs, mark wires independently by means of an adhesive tape according to numbering of cylinders (it is considered the first the cylinder nearest to transmission).

2. Try not to damage isolation of wires. Accurately remove tips of wires from shafts of candles (in order to avoid damage of the contact plug pull only for a tip, - at all for a wire).

3. Before to start a reversing of spark plugs it is necessary to remove from their niches small dust and a dirt in order to avoid their hit in cylinders. Take advantage of a small brush, or blow niches the compressed air (for this purpose the usual bicycle pump perfectly will approach).

4. By means of the special key equipped with the elastic loose leaf, turn out spark plugs. In order to avoid damage of a ceramic insulator try to hold at a candle reversing a head of a key in parallel its axes. Having turned out all candles, make check of their condition (see further).

5. The external condition of candles can give a lot of helpful information on degree of deterioration of the engine. If the working end of a candle shines and is free from touches and adjournment, hence, in combustion chambers too poor air-fuel mix moves, or the candle has excessively high калильное number (heat removal from electrodes in a hot candle occurs less intensively, than in cold).
6. If the working end of a candle and an internal central insulator are covered by a thick layer сажистых adjournment, hence, the mix is too enriched. Black окрас a working part of a candle in a combination to oil traces testifies to internal deterioration of the engine, or also excessive enrichment of a mix.
7. Golden or serovato-brown colouring of a working part of a candle is the certificate of correct configuration of an air-fuel mix and good inwardness of the engine.
8. One of the major parametres defining efficiency искрообразования of a candle is the size of an interelectrode backlash. Rating values of candle backlashes are resulted in Specifications.

9. For installation of an interelectrode backlash measure it by means of special probeа, then extremely accurately turn in a lateral electrode in a corresponding direction. Do not try to correct at all position of the central electrode as it can lead to failure of an internal porcelain insulator that is fraught with the most serious consequences. Щуп лезвийного type of a nominal thickness should slip hardly in a backlash between electrodes.

10. Special tools for updating of backlashes can be got practically in any shop of automobile accessories.

11. Before installation of candles make sure of reliability of fixing of carving nozzles, and also in cleanliness and serviceability of a condition of coils of a carving. Frequently наживить a candle in a carving aperture of a niche without a warp it appears difficultly enough. In order to avoid damage of a carving to a head of cylinders at such warp put on a shaft of a candle a piece of a fuel hose of suitable diameter. Grasp the end of a hose fingers and begin наживлять a candle. As soon as the warp will cause appreciable resistance to rotation, the hose will start to be turned that completely excludes risk of damage of a carving.

12. Having finished наживление candles, remove from it a hose piece. The further tightening is made with the help динамометрического a key. Operating in the same manner, establish on the engine all spark plugs.

13. In summary, connect to candles ВВ of a wire and establish into place all components acting in film for the purpose of providing of access.