Best Cylinder Leak Down Tester

If You’re Looking for a Quality Product That Will Give You Accurate Readings Every Time, Then You’ve Come to the Right Place.

Our editors independently selected each item on this list. Mechanicaddicts may collect a share of sales from links found within these pages if they choose to buy something. Reviews have been edited for length and clarity; enjoy finding your favorite products today!

Are You Looking for a Quality Leak Down Tester on the Market?

An engine’s cylinder pressure is an essential factor in its performance. The cylinder pressure affects how much fuel is burned and how efficiently the engine operates. A way to check cylinder pressure is with a leak-down tester. A leak-down tester pressurizes the cylinders and then checks for leaks. If there are no leaks, then all of the pressure is going into pushing the piston down.

This type of test is necessary because it can help you identify worn rings or valves, faulty gaskets, or cracked heads. A quality leak-down tester can withstand high pressures and have a large gauge for easy reading. An excellent leak-down tester also has various adapters to fit different engine types.

There Are a Lot of Factors to Consider When Trying to Find the Best Cylinder Leak Down Tester for Your Needs


A leak-down tester is an essential tool for any mechanic or car enthusiast. It allows you to identify leaks in your engine cylinder, which can help you diagnose and repair problems like faulty head gaskets, worn piston rings, or damaged cylinder bores. However, there are a lot of different leak-down testers on the market, and choosing the right one for your needs can be tricky. Some factors to consider include the amount of compressed air you're using and the tester's accuracy.

A leak-down tester is an essential tool that can be used to test the health of an engine. It works by pressurized air being introduced into the cylinder, and the tester measures the amount of leakage. A healthy engine should have very little leakage.

There are some factors to consider when choosing a leak-down tester. The first is the type of engine you have. There are different testers for different types of engines. Second, you need to consider the brand. Some brands are better than others. Third, you need to consider the price. You don't want to spend too much money on a tester that you'll not use very often. Finally, you need to consider the features. Some testers have more features than others.

How We Choose a Quality Leak Down Tester for You

A quality leak-down tester is an automotive tool that accurately finds engine leakage. It does this by measuring the pressure in the cylinders with a gauge and giving a readout of the percentage of leakage. Most importantly, it helps you target the source of the problem so you can make necessary repairs. You'll know which cylinder leaks and whether the rings, valves, or head gasket need attention.

When we choose a leak-down tester for you, we look at factors like ease of use, reading accuracy, construction quality, and even price. We also consider whether the tester comes with an instruction manual or video tutorial. After all, you should understand how to use this tool before receiving it.

Whether You’re a Professional Automotive Technician or a Do-It-Yourselfer, We Want to Help You Find the Best Leak Down Tester Kit for Your Needs

We Have Reviewed five of the Best Cylinder Leak Down Testers on the Market

FAERSI Cylinder Leak Detector

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What You Should Know About This Product

The FAERSI Cylinder Leak Detector Kit is a powerful tool for diagnosing engine problems. It can easily detect various faults, including worn piston rings, worn valves, cracked cylinder bores, and faulty head gaskets. The kit also includes a 12-month warranty, so you can be confident in its performance. Additionally, the engine compression diagnosis tester kit can check the amount of leakage and locate the leak area in an engine cylinder to help determine the source.

It is suitable for work on any petrol engine with 12 or 14-mm spark plugs and ideal for testing trucks & late model cars where clearance is minimal. Finally, the cylinder leakage pressure detector test set comes with an ABS plastic blow-molded case to keep the tools organized and safe.

What We Like About This Leak Down Tester

The FAERSI Cylinder Leak Detector is a professional quality tool designed to help you locate leaks in cylinder heads, intake manifolds, and exhaust manifolds. The kit comes with everything you need to get started, including a 480mm hose, 12mm and 14mm spark plug adapters, fixed short connector, fixed long connector, Gauge (2-1/2”):0-100 psi(0-7bar), air regulator, instructions and carrying case.

Simply connect the hose to the spark plug hole of the cylinder you wish to test and pump up the pressure. The gauge will give you a reading of the pressure in the system, and the LED light will indicate if there is a leak. The FAERSI Cylinder Leak Detector is an essential tool for any mechanic or do-it-yourselfer.

OTC 5609 Cylinder Leakage Tester Kit

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What You Should Know About This Product

OTC's Cylinder Leakage Tester Kit is an essential tool for any mechanic. It quickly diagnoses internal engine problems and comes with adapters for most applications. The pressure-regulated manifold with quick couplers makes it easy to use, and the 24-inch long 14mm flex hose gives you plenty of reaches.

The 10 mm, 12 mm, and 18 mm thread adapters make it compatible with various engines. The rugged, blow-molded storage case keeps everything organized and protected when not used. The kit also includes a detailed instruction chart to help you get the most out of your testing.

What We Like About This Leak Down Tester

Any auto enthusiast knows that engine troubles can be a headache. Thankfully, the OTC cylinder leakage tester kit can quickly diagnose internal engine problems, so you can get back on the road in no time. The tester features dual 2-1/2 inch gauges with chrome bezels and rugged protective outer boots, making it easy to get an accurate reading. It's also calibrated for 0-100 PSI and 0-700 kPa, so you can use it on various applications.

JIFETOR Cylinder Leak Down Tester Kit

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What You Should Know About This Product

The JIFETOR cylinder leak gauge set is a valuable tool for diagnosing engine problems. It can be used to detect weak piston rings, valves, and cracks in cylinder bores, as well as faulty head gaskets. The set includes a single gauge that shows the percentage of cylinder leakage or a twin gauge manifold that shows both cylinder leakage and cylinder pressure.

It is suitable for any gasoline engine with 14, 12, or 10-mm spark plugs. The leak detector works by feeding compressed air (45-100psi) into the cylinder through the built-in pressure regulator. The amount of leakage is then indicated on the cylinder leakage gauge. This information can be used to make an accurate diagnosis of the problem.

What We Like About This Leak Down Tester

There is a twin gauge manifold assembly with an American style air plug, pressure regulating valve, aluminum manifold body, cylinder pressure gauge, cylinder leakage gauge, and 19" long rubber nylon resin hose with the quick coupler on the assembly. The two gauges adopt rubber cover protected 3" large dial, the pressure gauge with scale range 0-100psi/0-7bar, and the leakage gauge with color-coded range marked with high, moderate and low range.

There are 3 sizes of adapters brass coated aluminum 14mm(fixed on a 10" long hose), aluminum 12mm, and 10mm (both can be connected to a 14mm adapter), which can help to test the gasoline engine with 10 12 14mm spark plugs. The instruction introduces detailed notification, connection method, operation steps, and fault diagnosis. The whole set is packed in a sturdy case easy to carry and store. It is essential for car or truck owners, garages, or repair shops.

CHEINAUTO Cylinder Leak Down Tester

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What You Should Know About This Product

The Cheinauto cylinder leak-down tester is a diagnostic tool for leaks in automotive cylinders. The tester is connected to one of the cylinders, and air pressure is fed into the cylinder. The amount of leakage is indicated on the cylinder leakage gauge, which can be heard at various points in the car's system.

The tester can diagnose problems with the cylinder, piston, rings, valves, or head gasket. It can also be used to identify worn or damaged parts. A tester is an essential tool for any mechanic or do-it-yourselfer who wants to maintain their car's performance. The CHEINAUTO Cylinder Leak Down Tester has everything you need to test for leaks in your cylinder.

The dual gauge assembly shows both the percentage of leakage and the pressure in the cylinder, while the 10" rubber nylon resin hose with brass-coated aluminum adapter makes it easy to connect to any air source. The 12mm and 10mm aluminum adapters with o-rings provide a snug fit, and the detailed instruction booklet makes it easy to follow. Plus, the whole kit comes in a handy blow molding case, so you can easily take it wherever you go.

What We Like About This Leak Down Tester

There are many reasons to like this particular leak-down tester. First, the pressure regulating valve is easy to use. Simply pull it out to use and push it back to lock. You can also easily adjust the air supply by twisting the knob clockwise or anticlockwise. Additionally, it comes with adapters that make it compatible with most gasoline engines. The adapters are made of brass-coated aluminum and are available in three different sizes. Finally, the leak-down tester is easy to store thanks to its compact design. Overall, this is an excellent choice for anyone needing a leak-down tester.

KUNTEC Cylinder Leak Down Tester

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What You Should Know About This Product

The KUNTEC Cylinder Leak Down Tester is a diagnostic tool designed to easily and quickly detect various engine faults. These faults include weak piston rings, worn valves, cracked cylinder walls, and blown head gaskets.

Simply connect the tester to the spark plug hole of the cylinder you wish to test, pump up the pressure, and observe the pressure gauge. The pressure gauge has a dual scale that reads from 0 to 100 PSI and 0 to 7 Bar. It also shows pressure in PSI and Bar and the percentage of cylinder leakage.

The tester comes with a quick female connector, metric adapters M12x1.25(with o-ring) and M14x1.5(with o-ring), an extension hose, and a gauge base. With this comprehensive kit, you'll be able to accurately diagnose engine problems and get your vehicle back on the road in no time!

What We Like About This Leak Down Tester

A cylinder leak-down tester is essential for any mechanic or car owner. It detects various engine faults, such as weak piston rings, valves, cracked cylinder walls, and blown head gaskets. This high-quality TU-21 cylinder leak detector comes with a double gauge system, making it suitable for any petrol engine with 12 or 14-mm spark plugs. It is also ideal for testing trucks and late model cars where clearance is minimal.

With this tool, you can quickly check the amount of leakage in 4-stroke engines. The pressure gauge has a dual scale that reads from 0 to 100 PSI and 0 to 7 Bar. It also shows the pressure in PSI and Bar and the percentage of cylinder leakage. The kit includes a quick female connector, metric adapters M12x1.25 and M14x1.5 (with o-rings), an extension hose, a gauge base, a leakage gauge, a pressure gauge, a quick male connector, a regulator, and an adapter hose.

Cylinder Leak Down Tester FAQs

How Does a Cylinder Leak-Down Tester Work?

A cylinder leak-down tester is a diagnostic tool for engine leaks. The tester is attached to the engine, and the air is injected into the cylinder. The tester measures the amount of air that leaks out of the cylinder. If there is a significant amount of leakage, it indicates that there is a problem with the seals or gaskets.

The leak-down tester can also be used to check the condition of the piston rings. If the rings are worn or damaged, they will allow more air to escape from the cylinder. By testing the cylinders, mechanics can quickly identify which engine parts need to be repaired or replaced.

What Is the Difference Between a Compression Tester and a Leak-Down Tester?

A compression test measures the amount of pressure that the cylinders in an engine can generate. The test uses a unique gauge to measure the pressure exerted on a piston as it moves up and down in the cylinder. On the other hand, a leak-down test is used to determine if there are any leaks in the engine cylinders. To perform the test, the technician will first close all of the valves in the engine so that no air can escape.

Next, they will use a pump to force air into one of the cylinders and measure the pressure loss over time. By comparing the results of both tests, it is possible to identify any potential problems with an engine.

How Do You Determine if You May Have Blown Head Gaskets Using a Cylinder Leak-Down Tester?

A blown head gasket can cause several engine problems, from decreased power and efficiency to overheating and oil leaks. If you suspect your head gasket may be blown, one way to check is to use a cylinder leak-down tester. This tool attaches to the spark plug hole and pressurizes the cylinder, allowing you to check for leaks in the head gasket.

To use the tester, start by removing all the spark plugs from the engine. Next, attach the tester to the first cylinder and turn on the engine. The tester will pressurize the cylinder, and you should be able to hear any leaks through the tester's gauge. You will need to replace the head gasket if there is a leak.

Do You Need Compressed Air to Operate a Cylinder Leak-Down Tool?

A cylinder leak-down tool is an essential piece of equipment for any mechanic or car enthusiast. It is used to test the condition of an engine's cylinders and can help to diagnose a wide range of problems. The tool works by pressuring the cylinder with air and then measuring the air that escapes.

To operate the tool, you need a source of air pressure - typically an air compressor. However, some models of cylinder leak-down tools are designed to be used with an ordinary hand pump. Ultimately, whether or not you need air to operate a cylinder leak-down tool depends on the model you are using. Consult the instruction manual for your particular tool to determine what type of air source is required.

What Is an Excellent Leak-Down Test Result?

For typically aspirated engines, 5 to 10 percent loss indicates the engine is in excellent condition. If an engine reads between 15-20 percent, it's not a reason for condemning the engine – but be more concerned about where the leakage is occurring. And at 30 percent, there are some significant problems, and an overhaul is likely.

When Using a Cylinder Leak-Down Tool, What Does It Mean When Air Escapes Through the Throttle Body’s Air Inlet?

A cylinder leak-down test is a tool that helps to diagnose engine problems by pressurizing the cylinders and then checking for leaks. If air escapes through the throttle body's air inlet, it means an issue with the cylinder's intake valves.

What Are Some Quality Cylinder Leak-Down Tools?

Few tools are more essential when diagnosing cylinder leaks than a quality leak-down tester. There are many different models on the market, but some of the most popular include the ABN cylinder leak detector, the KUNTEC leak detector, and the CHEINAUTO leak detector. Each of these tools has its own unique features, but they all share one important commonality: they can help you quickly and easily identify leaks in your engine cylinders.

What Works Best for You?

There are a few factors to consider before purchasing a cylinder leak-down gauge. The first is the accuracy of the gauge. Make sure to choose a gauge that is accurate to within +/- 2%. The second factor is the range of the gauge.

Choose a gauge that has a range of 0-100 PSI. The third factor is the environmental conditions under which you'll use the gauge. If you'll use the gauge in extreme cold or heat, choose a model for those conditions. Finally, consider your budget. There are a variety of gauges available at different price points. Considering these factors, you can choose the best cylinder leak-down gauge for your needs.

Our Final Thoughts :

As we come to the end of our article, we hope we have helped you determine the best leak-down tester brand for your needs. We have taken the time to provide you with information on various brands. We hope you will use this information to find the perfect set. Thanks for reading!

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