What is the method for replacing spark plugs?
2 Answers
The method for replacing spark plugs is: 1. Remove the engine cover and unscrew the fixing screws of the high-voltage line terminals; 2. Remove the high-voltage line terminals, loosen the spark plugs, then insert the soft tube from the high-voltage line terminal into the combustion chamber and pull out the spark plugs; 3. Align the new spark plugs with the screw holes and tighten them with tools. Symptoms of spark plug failure include: 1. Causing the engine to produce a large amount of carbon deposits; 2. Difficulty in starting the car; 3. Excessive exhaust emissions; 4. Insufficient power; 5. Black smoke from the exhaust pipe; 6. Idling vibration; 7. Electrode melting with the insulator turning white; 8. Electrode rounding with scars forming on the insulator.
The method for changing spark plugs is actually quite simple, but it must be done step by step for safety. I often help my neighbors with this on weekends. The first step is to wait until the engine is completely cool—don't rush to avoid burns. Next, remove the ignition coil cover and carefully unscrew the old plug using a spark plug wrench, making sure no dust falls into the cylinder bore. Before installing the new spark plug, check the electrode gap, usually adjusted to around 0.8 mm as per the manual. Use a torque wrench to tighten it slowly to about 20 Nm—too tight and the threads may break, too loose and it may leak. Finally, reconnect the coil and wires, then start the engine to ensure it runs smoothly. The whole process takes about half an hour, and the tools cost just a few dozen dollars, much cheaper than going to a shop. Plus, it helps prevent a spike in fuel consumption.
