To perform the work, you will need a special socket wrench for 21 mm spark plugs.
It is convenient to replace candles one by one.
Execution sequence
1. Remove the high-voltage wire from the candle of the first cylinder (see «High voltage wires - check and replacement»).
2. We wipe with a rag and blow compressed air from the tire pump to the installation site of the spark plug (so that grains of sand do not get into the cylinder after removing the spark plug).
3. Using a 21 mm socket wrench for spark plugs, unscrew the spark plug.
4. Before installing the spark plug with a set of round probes, we check the gap between its electrodes (see «Spark plugs - replacement»). The gap should be 1.0-1.1 mm.
Comment. When checking the gap with flat feeler gauges, the measurement results will be incorrect.
5. We adjust the gap by bending the side electrode.
Warning! To avoid damage to the threads in the cylinder head, first wrap the spark plug by hand and then tighten by inserting the wrench into the wrench extension. The tightening torque of the candle is 30-40 Nm.
6. We wrap the candle in the cylinder head.
7. Similarly, we replace the candles of the remaining cylinders.