Spark plugs should be coated with silicone grease. When applying silicone grease, you must pay attention to it. It can only be applied to white ceramic parts, not to metal contacts. The function of silicone grease is to resist arcing and leakage, avoid leakage and spark plug breakdown, prolong the service life of rubber sleeve of ignition coil and ensure ignition efficiency.

You can also coat some insulating silicone grease on the interface between spark plug and cylinder pipeline to prevent moisture from entering and facilitate later disassembly.

Extended data:

Precautions for using spark plugs:

1. When replacing the spark plug, you must choose the size suitable for the vehicle, and the length and diameter should be consistent. In fact, there is no need to talk about how to judge this. If you buy the wrong model, you cannot install it. Even if you can assemble it, the slight difference in size will have a bad influence on the performance, and in serious cases, it will damage the engine.

2. The model number is printed on each spark plug, and the second letter in this string represents the size of the spark plug, including the diameter and length of the thread.

3. The materials used for spark plugs have a decisive influence on the replacement cycle. The mainstream spark plugs in the market are copper core, nickel alloy core, platinum core and iridium core. It is recommended to replace the copper core every 20-30 thousand kilometers.

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