What are the precautions for replacing car spark plugs?
2 Answers
There are 5 precautions for replacing car spark plugs: 1. When removing the high-voltage wire head, do not use excessive force or shake the spark plug insulator vigorously, as this may damage the spark plug's performance. 2. Wait until the engine is completely cooled before opening the engine guard plate, and take care to prevent external oil and dirt from entering the cylinder. 3. Ensure the spark plug electrodes and sealing gaskets remain clean; otherwise, various safety hazards such as air leaks or electrical leakage may occur. 4. During installation, align the socket properly and slowly screw it in. After reaching half the length, apply force to secure it firmly. 5. Tighten the spark plug according to the principle of vertical installation and removal to avoid potential air leaks.
I find changing spark plugs quite interesting, but there are many details to pay attention to, otherwise things can easily go wrong. First, you must choose the correct spark plug model based on your car's engine specifications – don't randomly buy ones with wrong heat range or size, as this could lead to poor ignition and increased fuel consumption. During installation, always use a torque wrench to tighten them according to the manufacturer's specifications – neither too loose nor too tight. I've seen a buddy tighten them too much and completely ruin the threads. Remember to perform this operation only when the engine is completely cooled to avoid burn risks. Before removing old spark plugs, clean the installation holes thoroughly to prevent dust from falling into the cylinders, which would be troublesome. Also check the ignition coils for signs of aging. After replacement, start the engine – if there's severe shaking, there might be installation issues. This job isn't difficult, but being patient can save you a lot of money and time.
