Spark plugs are a very important element in the engine. This simple detail has very high demands. Candle operates at high temperatures, pressures and electrical stresses. During operation, the candle should oppose the formation of a conductive coating and does not crack from the sudden cooling. On the bottom of the insulator can be seen on the thermal characteristics of a candle. The shorter the protruding portion of the insulator, the better the heat transfer to the colder body and a candle. Conversely, the longer the lower part of the facility, the candle burning, as heat is removed from these candles over a longer path. Heat-quality candles expressed its glowing numbers, which is designated in the marking. Value glowing numbers on the plugs, and Bosch spark to the production of the Russian Federation: A8 A9 A10 A17 A20 AN AN A23 A26 RF WI0 W8 W6 W4 W2 W07 BOSCH W1I W9 W7 W5 W3 W08 in the process of the engine spark gap between the electrodes on the average increases by 0,015 1000 km. Therefore, we recommend a regular basis (8-10 thousand km.) Examine and reduce the gaps in the electrodes. The maximum term of a standard spark plug is according to different manufacturers from 15 to 30 thousand kilometers.
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