VAZ 2101, 2102
1. Specifications
2. Operation and service
3. The engine
4. Fuel system
5. Ignition system
5.1. Installation of the moment of ignition
5.2. A backlash between breaker contacts in the ignition distributor
5.3. Check of devices of ignition at the stand
5.3.1. The ignition distributor
5.3.2. The ignition coil
5.3.3. Spark plugs
5.3.4. The ignition switch
5.3.5. Check of elements for suppression of a radio noise
5.4. Possible malfunctions of ignition, their reason and elimination methods
6. Start and gymnastics system
7. Transmission
8. A running gear
9. A steering
10. Brake system
11. An electric equipment
12. A body
13. Features of repair
14. Appendices



5.3.3. Spark plugs

If faults in ignition, especially in one or several cylinders are noticed, it is necessary to check up a condition of candles.

Preliminary check

1. Before test of a spark plug with a deposit or polluted clear on special installation by a stream of sand and blow compressed air.
2. If the deposit of light brown colour it can to be deleted as it appears on the serviceable engine and does not break work of system of ignition.
3. After clearing examine candles and adjust a backlash between electrodes. If on a candle insulator are available сколы, cracks or it is damaged приварка a lateral electrode a candle replace.
4. A backlash (0,5–0,6 mm) between candle electrodes check round wire щупом. To check a backlash flat щупом it is impossible, as dredging on a lateral electrode which is formed at candle work thus is not considered. A backlash regulate подгибанием only a lateral electrode of a candle.

Test for tightness

1. Screw a candle in a corresponding nest at the stand, and then create in the chamber of the stand pressure 2 МПа (20 kgs/sm2).
2. Drop from a butterdish on a candle some drops of oil or kerosene; if tightness is broken, there will be air vials, usually between an insulator and the candle case.

Electric test

1. Having adjusted a backlash between electrodes of a candle to 0,6 mm, screw it in a nest at the stand and tighten динамометрическим a key the moment 31–39 Н·м (3,2–4 кгс·м). Tightness is provided with an elastic lining of the union of a nest.
2. Establish a tip of a wire of a high voltage on a candle and submit on it high voltage impulses.
3. Thus the following can be observed.
4. In a stand eyepiece the high-grade spark between candle electrodes is observed; in this case the candle is considered excellent.
5. Искрение occurs between rated sportsman electrodes; it is necessary to lower pressure in the device and to check up, at what pressure comes искрообразование between candle electrodes. If it begins at pressure more low 0,3 МПа (3 kgs/sm2), a candle defective.
6. It is supposed a little искрений on a rated sportsman. If искрообразование is absent on a candle and on a rated sportsman probably that on a candle insulator there are cracks and that the category occurs inside, between weight and electrodes. Such candle выбраковывается.

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5.3.2. The ignition coil
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5.3.4. The ignition switch