How to Close a Spark Plug Gap

If you’re closing a spark plug gap, the first thing you need to do is make sure that you have the right tools. You’ll need a feeler gauge and a spark plug wrench. You’ll also need to know the size of the gap that you’re trying to close.

Once you have all of your tools, you can start closing the gap. To close the gap, you’ll want to use the feeler gauge to measure how much space is between the electrodes. If the space is too large, you can use the spark plug wrench to gently bend the electrode until it’s closer to the other electrode.

Once you’ve closed the gap enough, you can re-attach the spark plug and screw it in place.

  • Using a feeler gauge, measure the gap between the electrode and the ground wire on the spark plug
  • If the gap is too wide, gently bend the ground wire until it is snug against the electrode
  • If the gap is too narrow, use a small file to widen it slightly
  • Once the desired gap has been achieved, re-install the spark plug into the engine

How to Adjust Spark Plug Gap Without Tool

If you need to adjust the spark plug gap on your car, there’s no need to go out and buy a special tool. You can do it with a feeler gauge, which is a much cheaper option. Here’s how you do it:

1. Remove the spark plug from the engine. 2. Insert the feeler gauge between the electrode and the ground strap of the spark plug. 3. Adjust the gap until you feel a slight drag on the feeler gauge.

4. Re-install the spark plug and repeat for all other plugs.

Symptoms of Too Much Spark Plug Gap

If the spark plug gap is too wide, the engine will run erratically. The spark plugs may also overheat, which can cause pre-ignition and engine damage. If the gap is too narrow, the spark plugs may not fire correctly, which can lead to engine misfires.

Spark Plug Gap Too Big

If the spark plug gap is too big, it can cause several problems. First, the spark may not be able to jump the larger gap, which can cause misfires. Second, a larger gap can also cause the spark to be weaker, which can reduce fuel economy and performance.

Finally, if the gap is too large, it can allow engine oil and debris to enter the combustion chamber, which can lead to fouling of the plugs and other engine damage.

Spark Plug Gap Tool

If you’re a DIYer, then you know that having the right tools is essential to any project. That’s why we want to make sure you have the best spark plug gap tool for the job. A spark plug gap tool is used to adjust the distance between the electrode and the ground strap on a spark plug.

This ensures that the spark plugs fire correctly and efficiently. There are many different types of spark plug gap tools on the market, so it’s important to choose one that’s best suited for your needs. For example, if you’re working with small engines, then you’ll need a smaller gap tool.

On the other hand, if you’re working with larger engines, then you’ll need a larger gap tool. Spark plug gap tools come in both manual and electronic versions. If you’re working with sensitive equipment, then we recommend choosing an electronic version.

This will help you avoid damage to your equipment. When shopping for a spark plug gap tool, be sure to pay attention to the size and type of engine it’s designed for. This will ensure that you get the best performance out of yourtool.

Is a Smaller Spark Plug Gap Better

A smaller spark plug gap is usually better because it results in a more complete combustion of the air/fuel mixture in the engine. This means that the engine will run more efficiently and produce less emissions. It can also help to improve fuel economy.

Spark Plug Gap Mm

A spark plug is a device that helps create the spark that ignites the fuel in your engine. The spark plug gap is the distance between the end of the spark plug’s electrode and the metal tip that makes contact with the side of the spark plug. The size of this gap has a major effect on how well your engine runs.

If it’s too small, there won’t be enough space for the spark to jump, and if it’s too large, the air around the spark will be able to extinguish it. Ideally, you want to find a happy medium where the spark can jump without any problems. Spark plugs typically come pre-gapped from the factory, but it’s always a good idea to check before installation.

The right gap for your vehicle can be found in your owner’s manual or service manual. If you don’t have access to these documents, you can also look up the recommended gap online or ask a professional mechanic. Once you know what size gap your vehicle needs, use a feeler gauge to measure the current gap on your old plugs (if they’re being replaced) or on new plugs before installing them.

How to Close a Spark Plug Gap


What’S the Best Way to Close the Gap on a Spark Plug?

If your spark plugs have become fouled or damaged, they need to be replaced. But before you do that, you’ll need to remove the old ones. And in order to do that, you’ll need to close the gap on the spark plugs.

The best way to close the gap on a spark plug is with a feeler gauge. This tool is designed specifically for measuring gaps and will help you get an accurate measurement. To use a feeler gauge, simply insert it into the gap between the electrode and the side of the plug.

If it doesn’t fit, then you know the gap is too wide and needs to be adjusted. Use a pair of needle-nose pliers to gently bend the electrode until the feeler gauge fits snugly into the gap. Be careful not to damage or deform the electrode while you’re doing this.

Once you’ve closed the gap properly, re-insert the spark plug into its hole and hand-tighten it until it’s snug. Then finish tightening it with a wrench until it’s tight enough that it won’t come loose when engine vibration occurs.

How Do You Close Spark Plug Gap Without Tool?

If your spark plugs are fouled or damaged, they need to be replaced. But if they’re in good condition and just need a little maintenance, you can close the gap yourself without any special tools. The first step is to clean the area around the spark plug.

Be sure to remove any debris or dirt that could prevent the electrode from making contact with the metal tip. Next, use a feeler gauge to measure the gap between the electrode and tip. If it’s too wide, you’ll need to close it up.

To do this, gently bend the side of the electrode that’s farthest from the tip. You want to make sure that you don’t damage or break off the electrode, so be careful not to apply too much pressure. Once you’ve closed up the gap sufficiently, re-check it with a feeler gauge to make sure it’s within specifications.

If your spark plugs still aren’t firing correctly after closing up the gaps, there may be another issue at play and you should consult a professional mechanic for further diagnosis and repair.

What Happens If Spark Plugs are Gapped Too Much?

If your spark plugs are gapped too much, it will cause the engine to misfire. The spark plugs need to be close enough to the ignition coil so that they can create a spark. If they’re too far apart, the spark won’t be strong enough to ignite the air/fuel mixture in the cylinders.

This can lead to decreased performance and fuel economy, and in some cases, damage to the catalytic converter.


It’s important to close the spark plug gap on your car to ensure optimal performance. There are a few ways to do this, but the most common is to use a feeler gauge. You’ll want to insert the feeler gauge into the gap and then tighten the spark plug until it makes contact with the electrode.