To complete the work you will need: a special 16 mm spark plug socket wrench with an extension. The head of the key should have a rubber sleeve installed that holds the spark plug.
Removal
1. Remove the ignition coil of the first cylinder (see "Ignition Coil - Checking and Replacing").
2. Using a 16 mm spark plug socket wrench, unscrew the spark plug and remove it from the socket.
3. Remove the spark plug from the key head.
Adjustment
4. Before installing the spark plug, use a set of round feeler gauges to check the gap between its electrodes. The gap should be 1.0-1.1 mm.
When checking the gap with flat feeler gauges, the measurement results will be incorrect.
5. Adjust the gap by bending the side electrode.
Installation
Warning! To avoid damaging the threads in the cylinder head, first tighten the spark plug by hand and then tighten it by inserting the handle into the wrench extension. The tightening torque of the spark plug is 30-40 Nm.
We insert the spark plug into the key head and screw it into the cylinder head.
We replace the spark plugs of the remaining cylinders in the same way.