What are the symptoms of a spark plug being tightened too much?

[EstherDella]

The symptom of a spark plug being tightened too much is gas leakage, so we should not overtighten the spark plug when replacing it. Location of the spark plug: The spark plug is installed on the side or top of the engine. In earlier models, spark plugs were connected to the distributor via ignition cables. Over the past decade, most car engines have been modified to have the ignition coil directly connected to the spark plug. Steps to replace a spark plug: Open the hood, lift the plastic cover of the engine, and remove the high-voltage ignition wires. 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 external debris like leaves or dust and ensure they are 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 ignition wires according to the firing order, and then secure the cover.