7.1.5. Check and cleaning of spark plugs

Disconnect candle wires of a high voltage from spark plugs.

NOTE At a detachment of a candle wire of a high voltage pull for an insulating cap, instead of for a wire. Otherwise the wire can be damaged.

By means of a head for removal of candles turn out spark plugs from a head of cylinders.

ATTENTION Be careful, do not allow dirt hit in engine cylinders through an opening for a spark plug.

Check spark plugs on lack of the defects listed below.

1. Insulator damage.

2. Burning out of electrodes.

3. Deposit.

4. Damage or crack of a sealing washer.

5. A condition of enamel of an insulator on the candle end.

Fig. 7.4. Gap check between spark plug electrodes

Check a gap between spark plug electrodes by means of wire щупа and if necessary adjust its (fig. 7.4).

Nominal rate: 1,0–1,1 mm.

Fig. 7.5. Installation of spark plugs

Establish spark plugs and tighten them the nominal moment of an inhaling (fig. 7.5).

If candles are tightened by the moment exceeding nominal rate, damage of a carving to a head of cylinders is possible.

Inhaling moment: 20–30 N · m.