Silverline Spark Plug Gap Tool 0.5 - 2.55mm / 0.02 - 0.1" (202148)

Product Information

And while the spark plug is a pretty simple piece of equipment, it has to work in very tough conditions. With a properly gapped spark plug, you can be sure that your engine will run smoothly and efficiently. An incorrect spark plug gap can cause misfiring, poor fuel economy, a loss of power, and it can cause the plug to wear out faster. The best feeler gauge for a given application will depend mainly on the size of the gaps you are measuring, how durable you need the gauge to be, and what sorts of materials or parts you are measuring gaps between. The unique design of the OEMTOOLS Gauge makes it incredibly easy to use. The blades are color-coded, making it easy to find the right blade for the job.

If you’re looking for a comprehensive tool that can measure any spark plug gap, you’ll love this steel gap measuring tool from Hotop. It gives you 32 precise measurements, ranging from a width of .04 to .88 mm. The blades also include imperial measurements, making this tool incredibly versatile. Some of the most common sizes you will likely find yourself using include 1mm, 1.5mm and 2mm feeler gauges. However, the ones you tend to use the most will of course depend largely on what type of work you are doing.Why? Think about it. The truth is that spark plugs are manufactured to fit a wide variety of engines. Not all these engines, by the way, use the same spark plug gap. The manufacturer will most likely gap the plugs to the most common setting.

For working with very delicate or easily scratched materials, you may be better off with a plastic feeler gauge than a metal one. The same is also true if you are working in environments where a metal version might corrode, conduct electricity, or cause sparking. When the gap is too large, the voltage must travel too far. The farther the voltage must travel, the weaker the charge becomes. This can cause quite a variety of problems. That includes misfiring, fouled plugs, and engine hesitation. It can also cause a no-start or hard start problem. Can spark plug gap cause rough idle?

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For those who say that that spark plug gap isn’t really important, they might think otherwise when their car won’t start. Use a pair of needle-nose pliers to bend the ground strap up or down until it’s reached the correct height. Be careful not to touch the pliers to the center electrode or the surrounding porcelain. You can use some gapping tools for this but don’t use a round gapping tool, as this could damage the electrodes. This is why you should have the perfect spark plug gap tool. While all spark plug gap tools do basically the same thing, they aren’t all the same. Advice, how-to guides, and car care information featured on AutoZone.com and AutoZone Advice & How-To’s are presented as helpful resources for general maintenance and automotive repairs from a general perspective only and should be used at your own risk. Information is accurate and true to the best of AutoZone’s knowledge, however, there may be omissions, errors or mistakes. Like with any spark plug measurement tool, there is a slim margin for potential error in the measurements. For the price, though, this tool is quite accurate and a very useful tool to have in your garage for more than just adjusting spark plugs.