How long should a spark plug socket be?

The length of a spark plug socket can vary depending on the specific design and intended use. Generally, a standard spark plug socket is around 2.5 to 3 inches (about 63.5 to 76.2 millimeters) in length. This length is typically sufficient for accessing and removing spark plugs in most automotive engines.

It's important to note that spark plug sockets often have a rubber insert or a magnetic feature to securely grip the spark plug during installation or removal. The overall length of the socket, including the handle, can be longer, providing additional leverage and making it easier to reach spark plugs in deep or recessed areas within the engine.

When selecting a spark plug socket, it's essential to consider the specific engine and vehicle model you're working on, as different engines may have varying access points and configurations. Always refer to the vehicle's manual or consult with a professional mechanic to determine the appropriate socket size and length for your specific application.