What are the precautions after replacing spark plugs?

[SanEverly]

Precautions for replacing spark plugs are as follows: 1. Replace them when the engine is cold to avoid burns. 2. When removing, pull from the base of the high-voltage wire, not directly tugging the wire, as this may break the inner core. Also, mark the positions of each cylinder's high-voltage wires before removal to avoid confusion. 3. Before installing the spark plugs, ensure the new spark plugs are compatible with the engine of the vehicle. 4. Before replacement, clean any dust or oil around the ignition coil to prevent contaminants from falling into the engine. 5. After installation, check the ignition coil wiring and start the engine for a test run.