What are the precautions for installing spark plugs?
2 Answers
Precautions for installing spark plugs are: 1. Tighten the spark plug; 2. The selected spark plug should match the vehicle model requirements; 3. Apply anti-rust agent on the threads. The method for replacing spark plugs is: 1. Open the engine guard plate when the vehicle is cold; 2. Remove the fixing screws of the ignition coil; 3. Use a wrench to take out the spark plug; 4. Apply silicone grease to the ceramic part of the new spark plug; 5. Place the spark plug in the socket and install it. Reasons for spark plug damage are: 1. The fuel mixture in the car is too rich, causing unburned parts to accumulate on the spark plug and form carbonization; 2. The distance between the electrodes of the spark plug is too large; 3. Engine oil enters the cylinder; 4. Poor quality of the oil used.
I've changed spark plugs myself several times. The key is not to get the wrong model - it must match your car's engine. Otherwise, problems will occur even after installation. Before installation, ensure the engine has cooled down, and it's best to disconnect the negative battery terminal to prevent electric shock. Use a specialized wrench when tightening the spark plugs, applying moderate force; too tight can damage the threads, while too loose may cause gas leakage. I recommend using a torque wrench and following the manual's specifications, typically 20-30 N·m. Before installation, check the spark plug gap and adjust it to 0.7-1.0 mm using a gap gauge - gaps that are too wide or narrow will affect ignition. During operation, be careful not to let dust fall into the cylinder bore, as contaminating the cylinder would be troublesome. After installation, start the engine and listen for sounds - if you hear cracking noises or abnormal vibrations, shut it off immediately for inspection. Don't forget to keep new spark plugs as spares. Checking them annually can extend engine life.
