2.2.3. Replacement of spark plugs on cars without converter

Profitability and traction qualities of the engine in many respects depend on a condition of spark plugs. The type of candles has to correspond recommended, in this case care of candles during the period between their replacement as a rule is not required. Cleaning of candles is required seldom, and in the absence of the necessary equipment it is not necessary to clear candles in order to avoid breakage of electrodes.

1. If on tips of high-voltage wires there are no tags indicating belonging to this cylinder, then put tags from 1 to 4 (the 1st cylinder is located from a gas distribution mechanism chain). Disconnect wires, holding a tip, but not a wire.
2. Before turning out candles it is recommended to remove dirt from deepenings near candles by means of a pure brush, the vacuum cleaner or compressed air to avoid hit of dirt in cylinders.
3. Turn out candles a special candle key, either a cap key, or a face head with the extender. At an otvorachivaniye hold a head strictly in the direction of an axis of a candle, otherwise at a distortion of a head breakage of the porcelain insulator is possible. Candles are recommended to be checked by the following technique.
4. It is possible to determine a condition of the engine by appearance of a candle rather precisely. If the skirt of the insulator of a candle pure and white color and on it is absent a raid, then it indicates the grown poor gas mixture or that the insulator of a candle was heated (the heated candle badly takes away heat from an electrode, and on a cold candle heat is taken away quickly).
5. If the insulator and an electrode of a candle are covered with firm deposits of black color, then it testifies to the reenriched gas mixture. Massive oily deposits indicate that the engine is worn-out or used the reenriched mix.
6. If the skirt of the insulator is pruinose sand or reddish-brown color, then the engine is in good repair and composition of mix are optimum
7. The gap between electrodes of candles has special value, – at increase or reduction of a gap against norm the size of a spark interval and the igniting ability of a spark will significantly change. It is necessary to establish the optimum gap between electrodes specified in subsection 2.1.
8. Before adjustment measure a gap by the probe and turn in (or unbend) an external electrode before receiving the necessary gap. The central electrode is forbidden to be turned in as the insulator of a candle can burst that will entail serious breakages.
9. For measurement and adjustment of a gap on sale there is special adaptation.
10. Before installation of candles be convinced of durability of carving conclusions of the central electrode and of purity of a carving of candles and the insulator, using a piece of a rubber hose to wrap candles without distortion.
11. Remove a rubber hose and tighten I shine with a dynamometer key with a special face head. Wrap other candles.
12. Connect high-voltage wires in a former order, establish all removed details.