The best spark plug gap tool ensures accurate gap adjustments for optimal engine performance. Tools like the LISLE 20600 feeler gauge and Astro Pneumatic 78205 are top choices for their precision and ease of use.
When it comes to maintaining the vehicle’s engine, one of the most important yet often overlooked components is the spark plug. An essential part of your car’s ignition system, spark plugs must be properly gapped for optimal performance. To help with this, a spark plug gap tool is necessary for accurate adjustments.
In this guide, we’ll explore everything you need to know about the best spark plug gap tools available, how they work, and why they are crucial for keeping your engine running smoothly.
Contents
What is a Spark Plug Gap Tool and Why Do You Need It?
A spark plug gap tool is a small but highly effective device used to measure and adjust the gap between the two electrodes of a spark plug. This gap plays a important role in the ignition process, as the correct gap allows for a proper spark to ignite the fuel mixture in the engine. If the gap is too wide or too narrow, it can cause misfires, poor fuel efficiency, and engine damage. With the right spark plug gap tool, you can ensure your spark plugs are properly set, which will help maintain engine performance and longevity.
Properly gapping the spark plug is essential for various reasons. A gap that’s too small can result in incomplete combustion, reducing the engine’s efficiency and power. On the other hand, a gap that’s too wide can lead to spark misfires and inefficient fuel usage. For these reasons, maintaining the correct spark plug gap is a vital part of vehicle upkeep.
Types of Spark Plug Gap Tools
Before we dive into the best options, it’s important to understand the different types of spark plug gap tools available. Below are the most common:
1. Feeler Gauge Spark Plug Gap Tool
The feeler gauge tool is a traditional yet reliable tool used by mechanics for adjusting spark plug gaps. This tool consists of a set of thin metal blades, each labeled with a specific thickness. The user can insert the blade into the gap to measure the exact distance between the spark plug electrodes.
Pros:
- Simple, effective, and affordable.
- Accurate measurement for precise gap adjustments.
- Widely available at affordable prices.
Cons:
- Requires a steady hand for accurate measurements.
- May not be as easy to use for beginners compared to other tools.
2. Wire Gauge Spark Plug Gap Tool
The wire gauge tool is similar to a feeler gauge but is specifically designed for measuring the spark plug gap using a single metal wire. The wire is designed to slide into the gap to measure the distance. It’s easier to use for beginners due to its simple design and ease of reading.
Pros:
- Extremely easy to use, even for beginners.
- Clear measurements for precise adjustments.
- Compact design for easy storage.
Cons:
- Can only measure a certain range of gaps, so it’s less versatile than feeler gauges.
- Limited precision for high-performance engines.
3. Adjustable Spark Plug Gap Tool
As the name suggests, adjustable spark plug gap tools allow users to easily adjust the gap by using a rotating mechanism or dial. This tool is particularly useful when you need to frequently adjust the gap during routine maintenance.
Pros:
- Very convenient for frequent adjustments.
- Accurate and versatile for various spark plug types.
- Can be used for both measuring and adjusting gaps.
Cons:
- Slightly more expensive than simple feeler gauges.
- Requires more maintenance due to the moving parts.
Top 5 Best Spark Plug Gap Tools
Now, let’s dive into the best spark plug gap tools that stand out in the market. These tools are highly recommended by mechanics and automotive enthusiasts for their accuracy, ease of use, and affordability.
1. LISLE 20600 Feeler Gauge Tool
The LISLE 20600 is a fantastic tool for those looking for simplicity and accuracy. The set includes multiple feeler blades, providing users with several thicknesses to choose from for different spark plug gaps. Its sturdy build and low cost make it an ideal choice for car owners who want to perform basic maintenance themselves.
The easy-to-read markings on the blades make it a great option for beginners, while the reliability and affordability make it a popular tool among professionals as well.
Pros:
- Affordable and reliable.
- Easy to use for both beginners and professionals.
- Clear, labeled gauges for precise measurements.
- Can be used for various spark plug sizes and types.
Cons:
- May require a bit of practice to perfect the gap measurement.
- Feeler blades are quite thin, so they may bend if not handled carefully.
2. Performance Tool W89793 Wire Gauge Spark Plug Gap Tool
The Performance Tool W89793 is another excellent option for beginners. The wire gauge design is very user-friendly, and the tool is built to withstand regular use. It provides reliable measurements and is compact enough to carry in your vehicle for emergency use. This tool is perfect for everyday car owners who need a quick and reliable way to check and adjust their spark plug gaps without spending too much time on the process.
Pros:
- Ergonomic design for comfortable handling.
- Easy-to-read wire gauge for precise gap measurement.
- Durable, long-lasting construction.
- Compact and easy to store.
Cons:
- Limited to a certain range of spark plug gaps, may not work for all vehicles.
- A bit more expensive than basic tools.
3. Astro Pneumatic 78205 Adjustable Spark Plug Gap Tool
The Astro Pneumatic 78205 is perfect for those who need to adjust their spark plug gap frequently. This tool allows for quick and precise adjustments and is highly regarded for its ease of use and durability. With the adjustable mechanism, you can easily change the gap to meet manufacturer specifications, making it suitable for a wide variety of vehicles.
This tool is particularly useful for enthusiasts who work on their cars regularly and need a reliable, all-in-one tool for both measuring and adjusting spark plug gaps.
Pros:
- Adjustable mechanism for easy gap adjustments.
- Offers both measuring and adjusting functions in one tool.
- Suitable for various spark plug sizes.
- Highly durable and long-lasting.
Cons:
- Slightly higher price point than basic tools.
- May be too advanced for casual users who only need to measure gaps occasionally.
4. AccuTools Pro 7910 Digital Spark Plug Gap Tool
For those who want the highest level of precision, the AccuTools Pro 7910 is the go-to choice. This digital tool takes all the guesswork out of measuring and adjusting spark plug gaps. It’s an excellent option for enthusiasts or professional mechanics who require the utmost accuracy in their work. The digital display shows precise measurements, ensuring you can easily and quickly adjust the gap setting.
While the tool is more expensive than other options, the accuracy and speed it offers make it a worthwhile investment for professionals who rely on high-performance tools.
Pros:
- Digital display for precise measurements.
- Automatically calculates the correct gap.
- Ideal for high-performance and precision work.
- Accurate and fast gap measurement.
Cons:
- Requires batteries.
- Can be expensive for occasional users.
5. NGK Spark Plug Gap Tool
NGK’s Spark Plug Gap Tool is an excellent choice for everyday vehicle owners who need to make quick, basic gap adjustments. It’s simple, easy to store, and delivers accurate results for standard gap measurements. The NGK brand is known for making high-quality spark plugs, and this tool lives up to that reputation. It’s affordable, reliable, and an ideal choice for car owners who need a no-fuss solution for spark plug maintenance.
Pros:
- Trusted brand in the automotive industry.
- Simple and easy to use.
- Compact and portable.
- Suitable for a variety of vehicles.
Cons:
- Limited to basic use with fewer advanced features.
- Less durable compared to other tools in higher price ranges.
How to Use a Spark Plug Gap Tool
Using a spark plug gap tool is fairly straightforward. Follow these steps for accurate gap adjustments:
Step 1: Remove the Spark Plug: Use a spark plug wrench to carefully remove the spark plug from your vehicle’s engine. If your vehicle has more than one spark plug, be sure to keep track of which plug came from which cylinder for reinstallation.
Step 2: Measure the Gap: Select the correct feeler gauge or wire gauge from your spark plug gap tool kit. Insert the gauge into the spark plug gap to check its current width. The tool should slide into the gap with a slight resistance if the gap is within the correct range. If there is too much space or not enough space, the gauge may not fit properly.
Step 3: Adjust the Gap: If the gap is incorrect, use an adjustable spark plug gap tool or carefully bend the spark plug electrode with the appropriate tool to achieve the correct gap. Gently tap the edge of the electrode with the adjustment tool, making small, precise movements until the gap reaches the manufacturer’s specification. Be cautious not to apply too much pressure, as this could damage the spark plug.
Step 4: Reinstall the Spark Plug: Once the gap is set, reinstall the spark plug back into the engine and tighten it securely. Be careful not to overtighten, as this can damage the threads in the engine or cause the spark plug to become difficult to remove in the future.
Maintenance Tips for Your Spark Plug Gap Tool
To ensure that your spark plug gap tool remains in optimal condition and continues to deliver accurate measurements, proper maintenance is essential. Regular cleaning, careful storage, and routine inspections will help extend the lifespan of your tool and keep it functioning as expected.
- Clean Regularly: Keep the spark plug gap tool clean by wiping it after each use to avoid corrosion. Dirt and debris can cause inaccuracies in measurements.
- Store Properly: Always store your tool in a dry, safe place to prevent damage or misplacement. Some tools come with protective cases or covers, which are excellent for keeping your tool in good condition.
- Inspect for Wear: Regularly check the tool for wear and tear, especially the feeler blades and wire gauges, to ensure consistent performance. A worn-out tool might provide inaccurate readings and compromise your spark plug maintenance.
Frequently Asked Questions
Here are some FAQs about best spark plug gap tool –
1. What is the ideal spark plug gap for my car?
The ideal gap varies by car make and model. Check your vehicle’s owner manual or the manufacturer’s specifications for the correct gap.
2. Can I use any spark plug gap tool for all cars?
Yes, most spark plug gap tools can be used for various car models, but always ensure the tool you choose is compatible with the type of spark plugs in your vehicle.
3. How do I know if my spark plug gap is too wide or too narrow?
If the gap is too wide, you may experience engine misfires. If it’s too narrow, the spark might not be strong enough to ignite the fuel, leading to poor engine performance. Read about How to Close Spark Plug Gap.
4. How often should I check my spark plug gap?
It’s recommended to check your spark plug gap every 30,000 miles or as part of your routine vehicle maintenance.
5. Is an adjustable spark plug gap tool better than a feeler gauge?
Both tools are effective, but adjustable tools offer the convenience of making adjustments on the fly, while feeler gauges are typically used for measuring.
Conclusion
A spark plug gap tool is an essential part of routine vehicle maintenance. It ensures that your spark plugs are set to the correct gap, which helps prevent engine misfires, improves fuel efficiency, and extends the life of your engine. Whether you’re a beginner or a seasoned mechanic, investing in a high-quality spark plug gap tool will pay off in the long run by keeping your engine running smoothly. Remember, the best spark plug gap tool for you will depend on your needs and preferences, so choose wisely!