What is the gap size of a car spark plug?

[Ann]

The normal gap of a spark plug is generally 0.6~1.3 millimeters. Spark plug replacement procedure: Open the hood, lift the plastic cover of the engine, 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 external debris like leaves or dust and ensure thorough cleaning. 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, then secure the cover. Spark plug replacement interval: Under normal maintenance conditions, replace spark plugs every 40,000~60,000 kilometers. However, this may vary depending on the brand and engine type, so it's recommended to follow the owner's manual. Platinum spark plugs should be replaced at 40,000 km, standard nickel alloy spark plugs at 20,000 km, and iridium spark plugs at 60,000-80,000 km.