You will need:
- spark plug wrench
- beard
- round feeler gauge
- spark plugs
Spark plug wrench with a barb
Before you start working disconnect the wire from the "–" terminal of the battery.
Replace spark plugs every 30,000 km, even if they are still in good working order: old spark plugs can contribute to increased fuel consumption.
When preparing for winter use, replace the spark plugs with new ones.
Regularly check the reliability of the connections of the high-voltage wires to the spark plugs and ignition coil. Keep the high-voltage wires clean by periodically wiping them with a rag. Contamination on the wire insulation can lead to current leakage.
Warning! When checking and replacing spark plugs, be careful: if the engine is hot, you can get burned.
Caution: Do not tighten the spark plugs too much: the ceramic insulator of the spark plug may crack, which will lead to poor engine performance.
1. Remove the tip from the spark plug (do not pull the wire).
2. Clean the spark plug and the area around it from dirt so that no dirt gets into the cylinder when you unscrew the spark plug.
3. Carefully tap the spark plug with the key and then...
Recommendation for surgery 3: If the spark plug is difficult to unscrew after the first start due to the carbon deposits that have formed, do not apply much force so as not to damage the threads in the cylinder head. By slightly screwing and unscrewing the spark plug, gradually unscrew it from the head.
4....finally unscrew the candle by hand.
5. Inspect the spark plug. If there are cracks in the insulator, damaged threads or electrodes, the spark plug must be replaced.
6. Light brown carbon deposits, which evenly cover the lower part of the spark plug with a thin layer, do not affect the operation of the ignition system and do not need to be cleaned off.
7. The absence of carbon deposits on the spark plug indicates either that the engine is running on a lean mixture, or that the ignition timing is set incorrectly, or that the spark plug brand does not match the engine type.
8. A shiny black deposit indicates that oil has entered the engine cylinder. Such a spark plug must be cleaned.
9. Check the gap between the spark plug electrodes (only with a round feeler gauge). The gap should be 0.7–0.8 mm.
10. If the gap differs from the specified one, adjust it by bending the side electrode.
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11. Tighten the spark plug tip if it is loose on the threads.
12. Clean the oxidized contact in the high-voltage wire tip. If necessary, adjust the contact so that it fits tightly on the spark plug tip.
13. Screw the spark plug into the cylinder block and tighten it with a wrench. Install the tip onto the spark plug until it stops. Check that it fits tightly.