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3-27-proverka-i-zamena-svechejj-zazhiganiya-proverka-sostoyaniya-vysokovoltnykh.html
3.27. Check and replacement of spark plugs, check of a condition of high-voltage wires (petrol models)
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Spark plugs replace only on cold or slightly warm engine. The reversing of candles on the hot engine is interfaced to risk of damage of a carving in a light-alloy head (ah) cylinders. |
Replacement of spark plugs, depending on type, should be made through each 96 000 km or 160 000 km of run. Before the beginning of work prepare all necessary tools (some producers of spark plugs deliver special tools for measurement of a candle gap):
- Candle key of 16 mm, for example, HAZET 900AKF. HUNDRED Mercedes-Benzs apply for this purpose a candle key 3122В;
- It is in addition recommended to get special pincers, for example, HAZET 1849 which facilitate an otvorachivaniye of candles. Mercedes-Benz applies for this purpose an assembly key 3277А;
- Replaceable spark plugs (on number of cylinders), - see. Specifications.
Details of installation of spark plugs on petrol engines
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- Adjustment of interelectrode gaps on candles should be made directly ahead of their vvorachivaniye.
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Track, that acquired candles corresponded to type of the engine of the car! |
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- Wait complete cooling of the engine, - use free time for check of a condition of candles and measurement of their interelectrode gaps.
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On new candles interelectrode gaps are usually already exposed correctly at manufacturer. |
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- Check of candle gaps is made by introduction in space between electrodes of a candle corresponding on thickness щупа a special wire measuring instrument, - щуп should concern each of electrodes slightly only. In case of need turn in as appropriate bent part of an electrode by means of the regulator equipped with notches.
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At adjustment of a gap of a candle turn in only the basis of an electrode of weight, without touching its end. If the electrode of weight is displaced rather central electrode, modify its situation with the help of the same regulator. |
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Do not try to correct the provision of the central electrode at all! |
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- Remove the top section of an air purifier (see. Head of the Power supply system and production of the fulfilled gases).
- Disconnect from VV spark plugs electroconducting.
- Remove coils of ignition (T1/4) (see. The head of System of electric equipment of the engine) also turn out spark plugs (R4).
- Estimate the candles turned out from the engine according to the card of conditions (see a photographic insert in the Head of System of electric equipment of the engine). According to the analysis of appearance of the fulfilled candles it is possible to estimate the general condition of the engine.
- Estimate a condition of porcelain insulators of candles, - at identification of cracks the candle is subject to replacement.
- At identification of signs of damage of a carving the candle also is subject to replacement.
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The special tool for check of a condition of a carving part of the spark plugs, usually entering into a set of remnabor (for example BERU) is issued. |
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- By means of a special drill the damaged carving opening can be passable in a head of cylinders which for this purpose does not need dismantle). After that in a head the special is established.
- Before a candle vvorachivaniye slightly grease its carving part with medsoderzhashchy anti-taking structure. Fingers acquire a candle, having planted it in a reception opening in a niche, then tighten by means of the candle key whenever possible equipped with a dinamometrichesky measuring instrument (see. Specifications).
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In order to avoid a candle distortion at a vvorachivaniye pull on its shaft a small piece of a fuel hose which will carry out a role of the universal hinge, and in case of a distortion it will easily be scrolled on a candle, preventing thereby possibility of damage of a carving.
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- Establish to the place of the coil of ignition (T1/4) (see. Head of System of electric equipment of the engine).
- Before connection to a candle of high-voltage (VV) of a wire (model with separate coils) carefully check the last on existence of damages, signs of development of corrosion of internal contact. Measure resistive resistance of a wire, - if the result of measurement exceeds value of 30 kiloohms/meters, replace all wires in a set.
- Rotary progress densely plant a wire tip on screwed in a head of cylinders I shine.
- Operating in a similar manner, connect electroconducting to the remained candles, - try not to mix an order lit aniye.
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