Is it necessary to replace spark plugs at a 4S shop?
2 Answers
Spark plugs can be replaced either at a 4S shop or by yourself. The specific replacement steps are as follows: Open the hood, lift the plastic cover of the engine, remove the high-voltage distributor wires, and mark the position of each cylinder to avoid confusion. Use a spark plug socket to remove the spark plugs one by one. While removing them, check for any leaves, dust, or debris on the exterior and ensure they are thoroughly cleaned. Place the new spark plug into the spark plug hole, hand-tighten it a few turns, and then use the socket to tighten it further. Reinstall the removed high-voltage distributor wires according to the firing order, and then secure the cover. Spark plug replacement intervals: Under normal maintenance conditions, spark plugs should be replaced every 40,000 to 60,000 kilometers. However, this may vary depending on the brand and engine type, so it is recommended to follow the owner's manual. The following standards can be used as a reference for maintenance and replacement: Platinum spark plugs should be replaced every 40,000 kilometers, standard nickel alloy spark plugs every 20,000 kilometers, and iridium spark plugs every 60,000 to 80,000 kilometers.
I'm usually quite mindful of car maintenance costs, and getting spark plugs replaced at a 4S shop is indeed much more expensive. For the same set of NGK spark plugs, the 4S shop charged me over 600 RMB, while a local repair shop did it for 300 RMB. However, the key lies in the mechanic's skill. Once I had them replaced at an auto parts market, and the engine shook badly—turned out the torque wasn't applied correctly. Now I always go to a trusted repair shop and bring my own double iridium spark plugs bought from JD.com, saving enough money to fill up two tanks of gas. After the car's warranty expires, there's no need to stick to 4S shops, but make sure to choose the right model—turbocharged cars require spark plugs with a higher heat rating. Regularly cleaning carbon deposits can also extend spark plug life; I usually check them every 40,000 kilometers.
