This spark plug gap tool works with 14MM spark plugs. I love this tool. It puts an end to banging it on the ground to close the electrode space, then prying it open, realizing you went too far, tapping it on the concrete again, etc. For delicate spark plugs, the CTA 9-wire gap tool is a good option. It’s not as versatile as the other options on this list, but that may not be a problem for you if you’re only adjusting the spark plugs on one or two vehicles. Many experts say that if you drive normally (obeying speed limits, do a mixture of street and highway driving, etc.) you can actually increase your spark plug gap by about 0.010” for the best possible fuel economy. If the feeler gauge won’t go between the two electrodes, the space between them needs to be opened. Use the tool on the spark plug gap tool to open the electrodes, but just a very tiny bit. You can always make the opening wider if it is still too small, right?

The most notable thing about this Lisle spark plug gap tool is that it gives you a wider measurement range than many options. It goes from .02 inches to .1 inches. No matter what kind of car you drive, the spark plug gap will be within this range. You can use this worry-free on any kind of vehicle. An incorrect gap can lead to spark plug performance issues like engine misfires or increased plug wear. If it turns out you do need to adjust the gap, you don’t need to necessarily buy the best spark plug gap tool to do so. Needle nose pliers make a great homemade spark plug gapper. They’re the recommended spark plug gap tool for iridium, but they can also work for other spark plug styles. The residue that forms on the plug will tell you quite a bit about the overall spark plug gap. If you are interested in trying different gaps but don’t want to bang the electrode on the cement to close it, the K-Motor Gap Tool is what you are looking for.Setting the gap on spark plugs was one of the first things my father taught me to do when working on cars. This process was so simple. I was only 8 or 10 years old at the most and I learned to do it in about 5 minutes. The K-Motor spark plug gap tools does away with all that and gives you the perfect gap setting that you want right off the bat. No more banging, no more prying, no more damaged spark plugs because you’ve banged them just a little bit too hard.

If you’re stranded in the middle of nowhere buying a new set wasn’t possible. Did you remove the points, sand down the burned part with whatever you could find (a nail file? a scrap of sandpaper?) and then use a matchbook cover to set them temporarily? Quality: Cheaper gap tools can be inaccurate, resulting in misfires and other engine problems. Look for a tool made of quality materials that can easily adjust to get the perfect gap. This CTA gap tool is very well-built. It’s all steel, so it won’t break, and it’s not likely to be damaged by rust. The wires are strong enough that they won’t bend or chip from normal use, though they are susceptible to breaking under enough pressure. The only part we’re not a huge fan of is the gap adjuster. It’s functional but feels flimsier than the rest. Now, you may wonder why you’d need to measure the spark plug gap, especially on a new plug. Why Should I Measure The Spark Plug Gap?

Price: Spark plug gap tools come in various price points. If you’re on a budget, look for a tool that offers the features you need at a price that fits your budget. As different engines offer varied working environments, the style, size, and shape of the spark plug is influenced by factors like: