Spark plugs are an integral part of your engine, but they need to be replaced every so often. We'll tell you how to find out and what socket size you'll need.

Mind the gap Most new plugs come pre-gapped for your car’s engine. If not, use a gap tool to carefully adjust the air gap or the space between the electrodes. Slide the plug on the standardized ...

As you probably guessed, a spark plug socket is used to remove and install spark plugs. These tools are designed especially for use on spark plugs and often feature a narrow wall and a rubber ...

The spark plug should come out stuck in the rubber socket boot. 8. Put the new spark plug in. Twist it clockwise by hand first, then tighten it with the same wrench.

SnapOn S9724RHS Low-Profile Spark Plug Socket For those in the boat and motor business, encounters in tight quarters, rusted parts, and hot engine compartments are everyday occurrences. Any tool that ...

Spark plugs are an integral part of your engine, but they need to be replaced every so often. We'll tell you how to find out and what socket size you'll need.