Is it necessary to apply silicone grease when replacing spark plugs?

[RosalieFitz]

Whether to apply silicone grease when replacing spark plugs? Silicone grease is a synthetic lubricating grease with properties such as ozone resistance, high temperature resistance, and aging resistance. It also has strong sealing capabilities, effectively preventing dust and contaminants from entering the sealed areas. Steps for replacing spark plugs: Open the hood, lift the engine's plastic cover, remove the high-voltage distributor wires, and mark each cylinder's position to avoid confusion. Use a spark plug socket to remove the spark plugs one by one. While removing them, check for any external debris like leaves or dust and ensure everything is cleaned thoroughly. 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 in the firing order, and snap the cover back into place.