1. Disconnect the wire from the terminal «minus» battery.
2. Remove the decorative engine cover (see «Removal and installation of a decorative casing of the engine»).
3. Remove tips of high-voltage wires from spark plugs.
4. Remove spark plug...
5....and remove it from the spark plug well.
Note: Inspect the spark plug and evaluate its condition by appearance (see «Diagnostics of the engine condition by the appearance of spark plugs»).
6. Use a round feeler gauge to check the gap between the electrodes of the spark plug. It should be 1.1 mm.
7. If the gap differs from the specified value, adjust it by bending the side electrode.
8. Similarly turn out and check up other spark plugs.
9. Install the spark plugs and all removed parts in the reverse order of removal.