Does replacing spark plugs not involve removing the intake manifold?

[DelSophie]

Spark plugs are usually installed on the cylinder head, not on or inside the intake manifold, so there is no need to remove the intake manifold when replacing spark plugs. If the spark plugs are damaged, it can directly cause various problems such as leakage in the vehicle's ignition system, increased fuel consumption, and reduced power. The most significant issue is difficulty in ignition, which affects the normal use of the vehicle. Severe erosion of the spark plugs, such as scarring at the top, damage, or melting and erosion of the electrodes, indicates that the spark plugs are damaged and should be replaced. Steps for replacing spark plugs: Open the hood, lift the plastic cover of the engine, and remove the high-voltage 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 make sure to clean them thoroughly. Place the new spark plugs into the spark plug holes, hand-tighten them a few turns, and then use the socket to tighten them further. Reinstall the removed high-voltage wires according to the firing order and secure the cover.