Spark Plug Gap Tools: What to Consider Before Buying One, Why You Need it

It is very important to consider a lot of things before you choose any spark gap tools. This will allow you to invest your money in the right and valuable spark gap tool for your car.

Now before you choose any spark gap tools you need to consider this:

It is very important to consider the cup of the spark gap tools before you invest your money in them. Before your car engine’s spark plugs can work properly, the gap between the center and side electrodes must be calibrated well so that it will ensure optimal engine performance. When the right gap ensures that the arcing occurs at the proper voltage to ignite the fuel and generates the combustion which will make the engine run well.

When adjusting the gap on a spark plug is time, you need to reach for a spark plug gap tool.

Why You Should Use a Spark Plug Gap Tool

If you want to maximize the performance of your vehicle or just want to double-check that the setting is right, it is very important to use your spark plugs tools tool.

1. Assures optimal spark plug performance

Assuring optimal spark plug performance is one of the major reasons why you should always use your spark plugs.

When you use a spark plug gap tool you will be able to achieve the exact measurement recommended by the manufacturer. This will help to boost the efficiency of the spark plug so that it will put out the correct spark to ignite the air and fuel mixture to power your vehicle.

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There are numerous recommendations by your car manufacturer. All you need to do is to check your owner’s manual for the correct spark plug gap for your vehicle.

2. Help prevent premature plug failure

Having a proper spark plug gap will help reduce the chance of burned electrodes that can be caused by premature spark plug failure. If the gap isn’t correct, then electrodes can burn, leading to failure.

3. Enables pre-gapped plugs to be adjusted

One of the common reasons why you should always use your spark plugs tools is that they will enable you to adjust pre-gapped plugs.

A lot of spark plugs claimed that they’re pre-gapped, that spark plug that can work in several different engines and isn’t set for your specific vehicle. You have to adjust the spark plug gap so that the vehicle performs as the manufacturer intended. Likewise, you need to check your owner’s manual for the right gap measurement, then check that the gap is set to the vehicle’s recommended setting when installing spark plugs.

4. Performance applications

Spark plugs tools allow all cars including stock, and racing car applications to simply want more control over the settings of your spark plugs, checking the spark plug gap will let you achieve your performance goals.

Types of Spark Plug Gap Tools

1. Feeler Gauge

A feeler gauge has been featured in numerous metal blades or wires of different thicknesses, a feeler gauge is like a pocket knife. Each blade or wire is a thickness marked in thousandths of an inch (imperial) or millimeters (metric). With a wide variety of blades or wires, let you measure almost any gap.

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You need to use it with iridium spark plugs and other plugs containing precious metals; feeler gauges are more accurate than other types. A drawback is a fact that you’ll need a pair of pliers so that you will be able to use them to bend the spark plug electrode because the blades will become deformed if you try using them to adjust the plug.

2. Coin Style Spark Plug Gauge

Coil style spark plug gauge is also one of the types of spark plugs cap tools that is common at the moment.

It is in a coin-like shape, a coin-style spark plug gauge features measurements around the edge. The gauge’s outer edge gets thicker as you move. This type of gauge is also called a ramp-style gauge.

Economically, it is possible to bend the spark plug electrode with this tool but accuracy can be an issue because of the gradual slope of the edge. Good for traditional copper spark plugs, it shouldn’t be used with iridium spark plugs. You need to know that using a coin gauge can damage the precious metals in this type of spark plug.

3. Wire Loop Spark Plug Gauge

The wire loop style is also one of the common spark plugs cap tools, it is like a coin but it has several wire loops of different thicknesses protruding from the edge. It is just as accurate as a feeler gauge, it has a hook to bend the spark plug electrode.

Best Spark Plugs Gap Tools On Amazon

If you are looking for high-quality spark plugs gap tools to buy on popular and trusted online stores, then you need to check out the best spark plugs gap tools on Amazon.

1. CTA Tools 3235 Spark Plug Gapper
2. Harrier Hardware Spark Plug Gap Gauge Tool, 3-Pack
3. Qagea Universal Spark Plug Gap Tool with Feeler Gauge Compatible with Most 10mm 12mm 14mm 16mm Spark Plugs (Red)
4. YZQPNB Universal Spark Plug Gap Tool Kit Compatible with Most 10mm 12mm 14mm 16mm Spark Plugs, Black Threaded Spark Plug Gap Tool (RED+Feeler Gauge)
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Spark Plug Tools FAQs

What can be used to Gap Spark Plugs without a Tool?

It is very simple to use the gapper. You just need to slide the spark plug electrode opening into the gap opener and slowly move it over to the smallest side of the gapper. Immediately after it hits the 0.02” area, you need to press the electrode down until it’s flush on each end of the gapper.

What tool do you use to gap spark plugs?

There are a wide variety of blades or wires, you need to measure any gap. Ideal for use with iridium spark plugs and other plugs with precious metals, feeler gauges are more accurate than other types.

What happens if you over-gap a spark plug?

A lot of people think the larger the gap, the better. But, if the gap is too large, and the ignition system won’t be able to provide the voltage needed to spark across the gap, or turbulence in the combustion chamber blows out the spark, misfires will occur

What is the correct range of gap size in the Millimeter of a spark plug?

Spark plugs in automobiles have a gap between 0.6 and 1.8 mm (0.024 and 0.071 in). The gap may need adjustment from the out-of-the-box gap.

What happens if spark plugs aren’t gapped correctly?

If the spark plug gap is not set properly, it may cause several engine issues. You may experience loss of power, misfires, spark plug fouling, increased plug wear, or poor gas mileage.