![]() This is the most common way to gap spark plugs because it’s quick and easy. We’ll show you how to do both methods so you can choose the best option. There are two ways to gap spark plugs: a feeler gauge, spark plug gapper, or a tool called a micrometer. Spark Plug Gap Cross Reference Chart (mm to inch) MM All you need is a feeler gauge, which consists of a handle with several thin metal strips, called blades, of different thicknesses that are used to measure gap settings. A feeler gauge is the most common way because it is quick and easy. You can measure the gap in two ways: with a feeler gauge or a micrometer. It is important to check your owner’s manual to see what the manufacturer recommends for your specific vehicle. Some newer cars with turbocharged or high-performance engines might have a larger gap. The majority of engines will have their spark plugs gapped at. You can find these gauges at most auto parts stores or online. What Is A Spark Plug Gap Feeler Gauge?Ī spark plug gap feeler gauge is a simple tool that helps you measure the gap between the electrodes on a spark plug. In general, this effect is desired in applications with late-model high output ignition coils and lower compression naturally aspirated engine applications where cylinder pressures are relatively low, and it’s easy for the spark to discharge. This is because there is a higher voltage build-up in the ignition system prior to spark discharge. That’s why it’s important to set the correct gap for your vehicle.Ī large spark plug gap setting requires a higher voltage to jump the distance between the electrodes. On the other hand, if the gap is too large, the spark will be too strong and can cause damage to the engine. If the gap is too small, the spark will be weak and might not ignite the air/fuel mixture correctly. This gap determines how much voltage is required to jump across the gap and create a spark. The gap setting on a spark plug is the distance between the electrode and the tip of the spark plug. ![]() This article will teach you how to gap spark plugs like a pro! How Does Spark Plug Gap Affect Performance? That’s why it’s important to know how to gap spark plugs correctly so you can avoid these issues and keep your car running smoothly. Spark plugs that are overdue for a tune-up can lead to all sorts of engine problems, such as misfiring, poor gas mileage, and decreased performance. If you’re like most drivers, you probably don’t think about your spark plugs until they start to cause problems.
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