What is the procedure for replacing spark plugs?
2 Answers
Procedure for replacing spark plugs: 1. Open the engine hood; 2. Clean the oil and dust near the high-voltage wire terminals, then loosen the screws with a wrench; 3. Remove the terminals and gently twist out the spark plugs; 4. Install new spark plugs; 5. Align the interface and quickly insert them, ensuring no dust or impurities enter, then reinstall the terminals. Spark plugs, commonly known as sparkers, function by discharging the pulsed high-voltage electricity sent from the high-voltage wires, breaking down the air between the two electrodes of the spark plug to generate an electric spark, thereby igniting the mixed gas in the cylinder. The main types of spark plugs include: standard spark plugs, insulator-protruding spark plugs, electrode-type spark plugs, seat-type spark plugs, pole-type spark plugs, and surface-jump spark plugs.
I've changed spark plugs myself before, and it felt pretty simple as long as you're careful. First, park the car on level ground and make sure the engine is cool to avoid burning your hands. Then open the hood and locate the spark plugs—there's one on each cylinder head. Use a wrench or a dedicated spark plug socket to disconnect the ignition coil wires. Next, remove the old spark plugs one by one, being careful not to drop any debris inside. When installing the new spark plugs, make sure they match the correct model, tighten them properly but don’t over-torque to avoid damaging the threads. Finally, reconnect the wires and start the engine to test—you’ll likely notice smoother running. The whole process takes about half an hour, and the tools needed are just a socket, gloves, and a rag. Regular replacements can save you a lot of money and improve fuel efficiency. Worn-out spark plugs can cause misfires, so if you feel the car shaking, it’s time to check them.
