Every 60,000 km.
Execution order

1. Disconnect the wires from the spark plugs.

2. Remove the spark plugs.


3. Measure the spark plug gap using a feeler gauge or special tool.

4. Adjust it by bending the tip.
5. Reinstall the spark plugs. To make installing the spark plugs easier, slide a short piece of tubing over the spark plug. This will act as a universal joint and prevent damage to the threads.
