Audi A3

Since 1997 of release

Repair and car operation

Audi A3
+ The maintenance instruction
- Current leaving and service
   The routine maintenance schedule
   The general information on adjustment
   Check of levels of liquids, the control of leaks
   Check of a condition of tyres and pressure in them
   Replacement of impellent oil and the oil filter
   Check of a gear belt of drive ГРМ on presence of damages, deterioration measurement
   Check of brake system
   Check of fuel system
   Rotation and replacement of wheels. Chains противоскольжения
   Check of a condition and replacement of hoses of an impellent compartment, localisation of leaks
   Check of functioning of system of cooling
   Check of a condition of system of release of the fulfilled gases
   Visual check of tightness of a box of a gear change
   Check of a condition of components of a suspension bracket and steering
   Check of a condition of protective covers of power shafts
   Greasing of clamps of doors and the lock cylinder
   Condition check, adjustment and replacement of brushes of screen wipers
   The visual control of a seat belt and the block of a pillow of safety
   Check of a condition of the battery, care it and gymnastics
   Level check трансмиссионного oils РКПП
   Replacement of the filter of air of salon
   Replacement of a filtering element of the air filter
   Replacement of a brake liquid
   Check and replacement of spark plugs
   Replacement of the fuel filter of the diesel engine
   Check of level of a liquid of system of hydrostrengthening of a wheel
   Check of level of a liquid of the main transfer of automatic transmission
   Oil replacement in coupling Haldex of models with a full drive
   Condition check drivers ridge belts
   Level check трансмиссионной liquids АТ
+ The engine
+ Systems of cooling, heating
+ The power supply system and release of the fulfilled gases
+ Engine electric equipment
+ Manual box of a gear change
+ Automatic transmission and models with a full drive
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Electroschemes

Check and replacement of spark plugs




Spark plugs replace only on cold or slightly warm engine. If candles are turned out on the hot engine, the carving of a head of the cylinders executed from easy metal can be damaged.

1. Before the work beginning prepare all necessary tools. Some manufacturers of spark plugs deliver special tools for measurement of a candle backlash.

It will be necessary for work for you:

– A candle key of 16 mm, for example, HAZET 900AKF. HUNDRED AUDI apply for this purpose a candle key 3122В.
– In addition it is recommended to get special pincers, for example, HAZET 1849 which facilitate отворачивание candles. AUDI applies for this purpose an assembly key 3277А.
– 4 spark plugs. Necessary candles are specified in Specifications.
2. The best way of replacement of spark plugs is preliminary purchase of new candles, adjustment of their backlash and replacement of each candle by turns. At purchase of candles very important to choose those candles which are intended for the engine of your car. The information on them can be received in Specifications to the Head of System of an electric equipment of the engine.
3. Having near at hand new candles, allow to the engine to cool down completely before the beginning of removal of the old. In this time it is possible to examine new candles on presence in them of defects and to check up candle backlashes.
4. The candle backlash is checked by insertion of a measuring instrument of the necessary thickness between electrodes on the candle end. The backlash should correspond specified in Specifications. The delay should concern only each of electrodes. If the backlash does not correspond to norm, slightly turn in the bent part of an electrode by means of a regulator with notches before achievement of necessary size of a backlash.


At adjustment of a backlash of a new candle turn in only the basis of an electrode of weight, without touching its end. If the weight electrode is displaced concerning the central electrode, by means of a regulator with notches level them. Check up a porcelain insulator on presence of the cracks specifying in those, it is necessary to replace a candle.

5. Switch off ignition.
6. The engine of 1.6 l: Turn away bolts of fastening and uncover the engine.
7. Engines to 125 h.p.: Расстыкуйте штекерные connections–2 spark plugs. Instructions: On an illustration the engine of other car is shown.
8. Blow niches for spark plugs if it is possible, compressed air that after removal of candles the dirt has not got to apertures for candles.
9. The engine of h.p. of 1.8 l/150: Turn away bolts of fastening and uncover the engine.
10. Расстыкуйте штекерные connections of coils of ignition. For this purpose delay upwards lock скобы.
11. Turn away bolts of fastening of coils of ignition to a head of cylinders and remove upwards from candles.


Visually check up consolidations between coils of ignition and a head of cylinders. In the presence of damages replace details.

All engines:
12. Turn out spark plugs a corresponding candle key. Thus pay attention to that the candle key did not warp that can lead to destruction of a ceramic insulator. Apply for corresponding a head, for example. HAZET 900AKF. HUNDRED AUDI apply for this purpose a candle key 3122В.
13. Compare the taken out candle with shown on pictures in Chapter 5, it will give you the helpful information on the general condition of the engine.
14. Check up probeом interelectrode distance. In AUDI A3 candles with three electrodes of weight are applied. Demanded value of a backlash is resulted in Specifications.


At new candles the interelectrode distance, as a rule, is established correctly.
If the candle carving has damage, it is necessary to replace it. For this purpose there is a corresponding tool and the repair complete set, in particular BERU. By means of a special drill there can be passed an old carving aperture. For this purpose it is not necessary to remove a head of cylinders. After that in a head of cylinders the new carving can be cut and by means of a special carving insert the candle is screwed. Carving inserts sit reliably and tightly.

15. For distance installation between contacts turn in a corresponding mass electrode. For this purpose knock sideways on a mass electrode. At подгибании обоприте a small screw-driver about carving edge. Do not lean at all against the central electrode as it can be damaged.
16. Put a little медьсодержащего antitaking structure on a carving of a new candle. Establish a candle in a head of cylinders and screw its fingers against the stop, then tighten by means of a head of a candle key. If it is possible, use for a candle tightening динамометрический a key to be assured that it is established correctly. The effort of a tightening of candles is included in Specifications.


In order to avoid possibility ввинчивания candles not on a carving put on its shaft a small piece of a rubber hose or a plastic tube. The flexible tube will work as universal – карданный the hinge, providing candle alignment in relation to a candle nest and in case the candle will start to warp, the hose will slip on it, without giving possibility to strip a thread.

17. Before connection to a candle high-voltage (ВВ) wires carefully examine it.
18. Connect a wire to the established new candle, again using a rotary motion and keeping for a socket while it will not be put on a candle up to the end.
19. Repeat the procedure described above for other spark plugs consistently to avoid wrong connection candle ВВ wires.
20. The engine of 1.8 l of 150 h.p.: Establish coils of ignition and tighten effort 10 Н m. Connect sockets.
21. Establish and tighten a cover.

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