Best Spark Plug Gap Tool Reviews | Top Picks in 2022

Best Spark Plug Gap Tool ReviewsWhether your car is an old classic model or a modern model with modern systems, a proper ignition system is very important.

To maintain a good ignition system and make sure it works the way it should, there are some important tools that help keep it smooth and running.

And now I’ll be talking about such a tool that will do just that. It’s called the spark plug gap tool. And in this review, I’ll help you find the best spark plug gap tools out there!

Editor’s Pick

A & E Hand Tools 4450A E-Z Grip Spark Plug Gap Gauge

If I had to choose, I’d prefer the A & E hand tools 4450A E-Z. It’s the easiest to use among the 3 gap tools I'm going to discuss soon.

A lot of people may prefer a spark plug feeler gauge over the gapping tool because it’s made of thin blades, so it ensures more accuracy than a spark plug gap closing tool.

But a spark plug gapper is better than the feeler gauge because you need a separate pair of pliers to bend the electrode. Plus, feelers are more expensive than gappers.

So, either way, buying a gapping tool is much more preferred. And I suggest the A & E hand tools 4450A E-Z grip spark plug gap gauge. Not only does it have a pre-installed recess for adjustment, but it’s also perfect for any car model. It’s also the most comfortable to use.

1. Stanley Proto J000K Spark Plug Gap Gauge Set

Highlighted Features

  • Needs no battery
  • Can be marked in both decimal or metric equivalent
  • Has a handle on it for easy gripping by a user
  • Has a reasonable price tag

Stanley Proto J000K Spark Plug Gap Gauge SetThis gap gauge is made in the United States. This one has an electrode bender with around 8 gauges with bent wire. The size of these gauges is measured in inches and starts at 0.22 inches and reaches up to 0.40 inches.

The weight of this gap tool is about 1.12 ounces, and its dimensions are 8.2 x 3.8 x 1.9 inches.

These kinds of gauges can be marked in either decimal or metric equivalent sizes. It has one handle, and also offers a proto branded tool. As far as I know, it doesn’t need a battery.

This one really is the perfect tool for your spark plugs. Generally, it’s good enough to replace your wrenches and pliers.

2. A & E Hand Tools 4450A E-Z Grip Spark Plug Gap Gauge

Highlighted Features

  • Easy use and accurate
  • Will certainly be within your budget
  • Provides satisfying performance
  • Features a comfortable handle

A & E Hand Tools 4450A E-Z Grip Spark Plug Gap GaugeThis tool has a recess made to adjust electrodes. If you turn it over, you can see a convenient little metric gapping scale on that very reverse side.

The unit even comes with a pocket clip. You can clip it to your shirt pocket and have with you always for when needed.

It works well on older models of vehicles, too. Mostly the ones that are equipped with ignition systems that have no distributors.

This is the simplest gap tool to use for opening plugs. Although opening the plugs too far could possibly make it harder to close them, but that can be overlooked for the ease of using this.

You’ll see that the tool is simple yet functional. And not only that, but it’s also very accurate. It’s helpful that this thing has one side showing inches and another showing millimeter. Considering its affordable price, this tool performs really well. But it’s probably the type you wouldn’t usually use unless you were a professional.

The product’s handle is made of hard plastic, so it’s very comfortable to hold and safer too. There’s an adjustment hole at the bottom of the tool which can be used for widening or narrowing the gap, and you don’t even need to apply much pressure when doing so.

3. OEMTOOLS 25352 Ramp Style Spark Plug Gap Gauge

Highlighted Features

  • Comes at affordable price
  • Can be carried on a keychain
  • Has 2 kinds of measurements stamped on the body

OEM TOOLS 25352 Ramp Style Spark Plug Gap GaugeThe OEMTOOLS gap gauge has the measurement ranging from 0.02 inch to 1 inch. This item also requires no batteries. The measurements of inches and metric sizes are stamped on the front and back of the gauge, respectively.

Now, the weight of this gap tool is about 0.64 ounces, and its dimensions are 5.5x 3.0 x 0.2 inches. So, the size shouldn’t be a problem.

It’s a very classic spark plug gap gauge. For the most part, this tool is used to adjust electrodes. So, it’s hardly possible for you to mess up with this one. It’s very user-friendly, so you won’t come across any issues while using this.

This thing isn’t compatible with a few sparks plug types, but if your car has OEM plugs, then this gauge is perfect for it.

This tool is small and convenient enough to be attached to your keychain and can be carried around.

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Buying Guide For Spark Plug Gap Tool

I have a few tips I would like to share with you on how to carefully select the appropriate spark plug gap tool.

There are different types for different jobs. So, your first job is to find out the type of spark plug your vehicle has. It is very important to know the exact model of the plug and the material used in it. The following are the types of spark plugs that you will find on the market:

  • Copper-nickel spark plug: This is the standard spark plug. It has a copper center coated in nickel. They’re cheap but also not that durable. But luckily, any gap tool will work for this one.
  • Platinum spark plug: It’s the same as the copper-nickel plug, but instead of nickel, it has a platinum coating. Platinum is harder than nickel, so it’s a bit more durable than the copper-nickel plug. This plug can be adjusted with the gap tool safely and not have damage done to it. This increases its lifespan more.
  • Iridium spark plug: This plug is also very long-lasting. The reason is simple; iridium is harder. They might be able to break easily but if you’re careful while using the gauge on them, then it’s fine. I would suggest you pick the gap gauges that have the wire style, instead of the disc design.
  • Silver spark plug: Silver is definitely a better conductor compared to the others. It’s also more durable. Be careful when adjusting it. It’s a rare type and found mostly in old model cars.


You don’t want to overspend for the tool. So, you need to consider the features of the spark plug gap tool against the price tag. If the price tag seems too expensive for the features, don’t buy it. Because there are a lot of products that offer you great value in return for the money.

Additional Features

Aside from the spark plug material and the price. there are other factors to consider too.

Like, if you have those wire spark plug, then use a wire style gap tool. This type will help you avoid putting pressure on the center electrode and press on the tip.


To close gaps in your spark plugs, there are plenty of tools to choose from. But what would be the easiest? You would choose the gap gauge, right? This tool was basically meant for this job, after all.

I hope you have found your best spark plug gap tool after reading this article. Let us know in the comments if you did.

About Jeremy

Hello! My name is Jeremy Bloomberg. I have been passionate about carpentry and DIY. Over the years, my passion slowly turned into expertise and wider knowledge about electronics. I’ve been involved in numerous projects, both professional and personal. I want to share all I have learned with you. Welcome!

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