Best Diesel Engine Compression Gauges in 2026

CYLINDER COMPRESSION TEST AND DIAGNOSTIC: JIFETOR automotive engine compression tester kit is used for measuring pressure on gasoline engine cylinder quickly and accurately. The gauge readings assist to diagnose if there are following problems: valve sticking, carbon build-up, cracked cylinder head or defective main gasket, poorly seated or worn piston rings, burned or damaged piston. Please refer to the vehicle manufacturer's service instructions or proprietary manual and our manual for detail

WIDE USE OF SMALL ENGINE COMPRESSION TESTER: There are 16" long flexible extension hose with 4 sizes (10mm 12mm 14mm 18mm) selectable brass adapters in the engine compression test kit, widely suitable for most types and depth spark plug well on gasoline petrol gas fuel engine cylinder, which is common in motorcycle, car, ATV, snowmobile, dirtbike, lawn mower, chainsaw etc. Please note, the engine compression gauge is not used for most diesel engine, due to the low pressure range 0-300PSI

UNIVERSAL AUTO CYLINDER PRESSURE TEST GAUGE CONNECTORS: The straight and angled push-on connectors in the cylinder compression tool kit are equipped with rubber tapered tip for easy and quick installation, you just need to push and hold it seal against cylinder head, rather than screw to tighten like 10mm 12mm 14mm 18mm appropriative adapters. These push-on connectors are also perfect for some types and depth spark well, which the appropriative adapters do not fit

FUNCTIONS: TEST CYLINDER COMPRESSION --- This cylinder compression tester kit is used for testing pressure on gasoline engine cylinder quickly and accurately. The gauge readings assist to diagnose if there are following problems: valve sticking, carbon build-up, cracked cylinder head or defective main gasket, poorly seated or worn piston rings, burned or damaged piston.

APPLICATIONS: GASOLINE ENGINE CYLINDER --- Come with different sizes rotary and push on adapters, widely suitable for most types and depth spark plug well on gasoline petrol gas fuel engine cylinder, which is common in motorcycle, car, truck, lawn mower, ATV and so on. NOT FOR DIESEL ENGINE.

UNIVERSAL: INCLUDE 10 CONNECT ADAPTERS --- 13-in-1 engine tester gauge kit includes 1-piece spring buckle gauge; 5-pieces brass adapters M10, M12, M14, M16, M18 for wide applications; 2-pieces straight and angled push-on connectors for direct testing; 1-piece extra long 8 inches extension straight rod, 1-piece 12 inches M12 extension hose rod and 1-piece 16 inches extension hose for long reach testing. Come with extra 2-piece spark plug testers.

【Complete Kit for Car Testing】: the 9pcs cylinder testing kit comes with 8 x compression tool and 1 x spark plug tester, total package includes 1 x SPARK PLUG TESTER, 1 x 300PSI DUAL UNITS GAUGE, 1 x STRAIGHT RUBBER CONE ADAPTER, 1 x CURVED RUBBER CONE ADAPTER, 4 x BRASS ADAPTERS, and 1 x 14-inch EXTENSION HOSE, complete package allows you to test the car’s condition easily by yourself

【Extra Value with Spark Plug Tester】: the spark tester is a must have diagnostic tool for engine which has a spark plug, you can diagnose ignition or engine outboard motor issues and a fault in the fuel delivery system quickly and easily; If spark is being sent, the tester will mirror the spark and you can see it light up, therefor you can find dirty spark plugs, defective points, bad cables or connections, etc.

【300psi Dual Units Gauge with 3” Dial】: easy to read this compression gauge which comes with 0 - 300 PSI and 0 - 20 kg/ cm square dual units, the gauge cover is protected by an anti-scratch coating and rubber protection to absorb shocks; Plus, all the items are contained in an ABS case for easy storage, the fittings can accommodate most or all of your needs for most engines, good kit overall for your garage

Sturty & Durable: Made of high-quality materials, and treated with rust and corrosion protection, sturty and durable enough. Large acrylic dial with rubber cover is convenient to read datas more accurately. Pressure range: 0-300 psi, 0-20kg/cm².

Professional Tester Kit: Our cylinder compression tester kit is a professional tool to measure pressure on gasoline engine cylinder quickly and accurately. It is suitable for petrol engines on motorcycles, cars, trucks, ATVs, and any other vehicles.

Easy to Carry: The handheld carrying case is made of high quality PVC, keeps all accessories in place and protects the gauges during storage and transportion.

ADVANCED COMPRESSION TEST: Includes everything you need for a fast & effective compression pressure testing of petrol, gas, and fuel engine cylinders for most spark plug types on cars, trucks, motorcycles, marines, ATVs, UTVs, snowmobiles, boats, & more

UNIVERSAL COMPATIBILITY: Includes multi-size adapters (straight, curved, & male fittings) for compatibility with a wide range of vehicles. All components are protected in a custom ABS carry case for easy organization and transport.

STURDY & ANTI-RUST: Easy-to-read instrument panel with dual units (0-300 psi, 0-21 kg/cm²). Acrylic glass gauge cover with anti-scratch coating and rubber protective cover for outstanding shock-absorption performance.

FUNCTIONS: TEST CYLINDER COMPRESSION --- This cylinder compression tester kit is used for testing pressure on gasoline engine cylinder quickly and accurately. The gauge readings assist to diagnose if there are following problems: valve sticking, carbon build-up, cracked cylinder head or defective main gasket, poorly seated or worn piston rings, burned or damaged piston.

APPLICATIONS: GASOLINE ENGINE CYLINDER --- Come with different sizes rotary and push on adapters, widely suitable for most types and depth spark plug well on gasoline petrol gas fuel engine cylinder, which is common in motorcycle, car, truck, lawn mower, ATV and so on. NOT FOR DIESEL ENGINE.

UNIVERSAL: INCLUDE 9 CONNECT ADAPTERS --- 10-in-1 engine tester gauge kit includes 1-piece spring buckle gauge; 5-pieces brass adapters M10, M12, M14, M16, M18 for wide applications; 2-pieces straight and angled connector for direct testing; extra long 8 inches extension tube and 16 inches extension hose for long reach testing.

AUTOMOTIVE CYLINDER COMPRESSION TESTER: JIFETOR engine compression tester kit performs specific accurate pressure test for gasoline engines, especially for small engines within a short time. The varied gauge reading can directly reflect whether there are some faults in the cylinder such as worn piston rings or valves, carbon build-up, cracked cylinder walls and blown head gaskets, etc. Widely suitable for motorcycles, cars, trucks, ATV's, snowmobiles, dirtbikes, lawn mowers, chainsaws, etc.

3" DIAL COMPRESSION GAUGE: The pressure gauge features clear reading, good air tightness and high precision. Equipped with dual scale big dial, quick coupler, anti-scratch resin window and rubber cover around for protection. The build-in check valve holds pressure to get maximum pressure value, and the release valve allows repeated tests without hose reassembly, save trouble. Remember to press it to release pressure before the test is over. Range: 0-300psi/0-20bar. Not for most diesel engines.

DEDICATED AND UNIVERSAL ADAPTERS: Compression gage is respectively available with extension hose and universal straight or angled spark plug adapter. 4PCS dedicated brass fittings(10mm 12mm 14mm 18mm) with sealed O ring, work with extension hose or rod to connect the corresponding spark plug wells. Specially provided aluminum extension rod can be assembled to the extension hose, make it easier and more convenient for rotating while installing the brass fittings to or unscrewing them from engine

Engine Compression Gauge: Dual scale of 0-300 psi and 0-20 bar. The engine cylinder gauge tester is built with quick connect system and pressure relief button for easy assembly & disassembly and allows repeated tests without removing the hose over and over again. 3-inch easy to read gauge is covered by hard-wearing rubber coating to prevent accidental falls or scratches. High visibility dial and sensitive hand help to know realtime pressure at a glance.

Engine Compression Gauge: Dual scale of 0-300 psi and 0-20 bar. The engine cylinder gauge tester is built with quick connect system and pressure relief button for easy assembly & disassembly and allows repeated tests without removing the hose over and over again. 3-inch easy to read gauge is covered by hard-wearing rubber coating to prevent accidental falls or scratches. High visibility dial and sensitive hand help to know realtime pressure at a glance.

Adapters & Hose: Cylinder compression tester kit comes with 2pcs universal rubber cone end adapters(straight type and 45° angled type) for quick compression check, 4pcs brass adapters for most types & depths of spark plug wells. Popular thread sizes: M10×1.0, M12×1.25, M14×1.25, M18×1.5. Flexible reinforced high pressure rubber hose has 16" in length and 300 psi W.P for extension function, enduring torsion and temperature to ensure security assurances.

PRECISE MEASUREMENTS: Digital compression gauge with incredible 0.5 display resolution within 1% of precise pressure from 10-250 PSI, for quick and accurate checking of gasoline engine compression. Acrylic glass gauge cover with scratch-resistant coating and Protective rubber cover with excellent shock absorption. A built-in one-way valve with pressure maintaining function ensures that the pressure gauge obtains the maximum pressure at the spark plug during the compression process.

Package: Including 10 Connection Adapters --- 11 in 1 Engine Tester Kit, including 1 Spring Buckle Gauge; 5 Pieces Brass Adapters M10, M12, M14, M16, M18, Wide Use; 200mm Metal Extension Rod Connector One , two 50mm metal aluminum straight rods and curved rods, one extension rod hose with M12*1.25 thread.

SMART DISPLAY & BLEED VALVE: Large, backlit LCD display shows large, clear 4-unit numbers. Automatically shuts off after 2.5 minutes of inactivity to preserve battery life. Side bleed valve allows repeated testing without disconnecting the hose

Function: The cylinder compression tester kit is used to quickly and accurately test the cylinder pressure of gasoline engines. Meter readings can help diagnose the following problems: stuck valve, carbon deposits, cracked cylinder head or defective main gasket, poor or worn piston ring installation, burned or damaged piston.

Packing: Including 10 connection adapters --- 11-in-1 engine tester gauge kit including 1 piece spring buckle gauge; 5-piece brass adapter M10, M12, M14, M16, M18, widely used; a 200mm metal Extension rod connector, two 50mm metal aluminum rod straight and bent rod, an extension rod hose with M12*1.25 thread.

Application: Gasoline engine cylinder --- equipped with different sizes of rotating and push-in adapters, widely used in most types of gasoline gasoline gas engine cylinders and deep spark plugs, common in motorcycles, lawn mowers, cars, trucks, ATV and many more. Not suitable for diesel engines.

FUNCTIONS: TEST CYLINDER COMPRESSION --- This cylinder compression tester kit is used for testing pressure on gasoline engine cylinder quickly and accurately. The gauge readings assist to diagnose if there are following problems: valve sticking, carbon build-up, cracked cylinder head or defective main gasket, poorly seated or worn piston rings, burned or damaged piston.

APPLICATIONS: GASOLINE ENGINE CYLINDER --- Come with different sizes rotary and push on adapters, widely suitable for most types and depth spark plug well on gasoline petrol gas fuel engine cylinder, which is common in motorcycle, car, truck, lawn mower, ATV and so on. NOT FOR DIESEL ENGINE.

UNIVERSAL: INCLUDE 10 CONNECT ADAPTERS --- 12-in-1 engine tester gauge kit includes 1-piece spring buckle gauge; 5-pieces brass adapters M10, M12, M14, M16, M18 for wide applications; 2-pieces straight and angled push-on connectors for direct testing; 1-piece extra long 8 inches extension straight rod, 1-piece 12 inches M12 extension hose rod and 1-piece 16 inches extension hose for long reach testing. Come with extra 1-piece cylinder stethoscope.

Best kit for the most popular truck/tractor engines for use on Cummins 5.9, Ford Powerstroke 6.0L, 6.4L, 6.7L, 7.3L (both styles), International Navistar 6.9/7.3L, International Navistar 4.5L VT275, 6.0L VT365E, 6.4L MaxxForce 7

Compatible with Repair and Replace on Cummins V6, V8, V12, 855, 5.9L, Detroit Diesel 53, 71, 92, 110, 149, V53, V71 with low or high clamp inj. hold down

Compatible with Repair and Replace on GM Duramax 4.3/5.7/6.2/6.5L/6.6L , CAT D-336, 1674, 1676, 3406, 3408, 3412; PERKINS 4.203, 4.236, 4.248, 6.354, 8.540

【Spot on Accurate】This digital compression gauge provides accurate measurements with an impressive 0.5 display resolution, which is within 1% of the exact pressure range of 10-200 PSI. You can rely on consistent and precise readings with no need for guesswork, unlike analog gauges that rely on pointer comparison.

【Versatility】Our product offers versatility with compatibility for 3 different thread sizes, including 2 sizes on the hose and an additional adapter. It's the ideal tool for all types of gasoline engines, including automotive, small engines such as lawn equipment, chainsaws, and four-wheelers, outboard boat motors, motorcycles, dirt bikes, and ATVs.

【Simple and Straightforward】13-inch hose ensure effortlessly reaches deepest spark plugs, quick connect coupler for added convenience, and the side bleeder valve allows for multiple tests without disconnecting the hose. Additionally, the backlit LCD screen displays large, clear numbers in 4 units, making it effortless to read even in dimly lit environments.

Duramax 6.6L 2005 and Up Diesel Compression Adapter

Use with most types of compression testers

May need additional adapters for attachment

Check compression on most domestic and foreign diesel engines, this compression tester reads pressure from 0-1000 PSI.

Featuring a quick-connect adapter, gauge and a thumb button air release, this compression tester comes with adapters for GM, Ford, Lincoln, Isuzu, Mercedes Benz, Kubota, Toyota, Volkswagen, Peugeot.

Quick-connect adapter

Checking Compression On Diesel Engine Quickly And Accurately.Mainly used to measure the maximum pressure generated in the compression stroke of the diesel engine cylinder. Specially designed to check the compression pressure of gas in the cylinder.

High Quality accessories, anti -oxidation and corrosion.

Various specifications, completed Kit Comes With Adapters For Most Applications

【Importance】 Use it to identify and diagnose fuel supply and injection systems for petrol-gasoline and diesel engines. With this lightweight utility set, you don't have to worry about the unexpected situation on the road

【Universal Fittings】 Including two adapters, is suitable for Chrysler, Ford, Toyota, Nissan, GM, and most cars or trucks worldwide. Refer to our detailed instruction

【Good Quality】Made of high quality solid brass, rubber and hose, rustproof, firm, wear-proof for long time use. Rugged molded plastic case is specially designed for easy transportation and storage

This diesel compression tester kit comes complete with adapters for both direct and indirect diesel injected engines

It checks diesel engine compression under cranking conditions and comes with small profile, quick coupling adapters for speed and security

The built-in pressure relief valve enables repeat tests without dismantling

◇ Best kit for the most popular truck and tractor engines for Cummins 5.9, Ford Powerstroke International Navistar 6.9/7.3L , Ford 6.0L

◇ Also compatible for Cummins V6, V8, V12, 855, Detroit Diesel 53, 71, 92, 110, 149, V53

◇ Also compatible for GM 4.3/5.7/6.2/6.5L , CAT D-336, 1674, 3406, 3408, 3412

Application – It used with diesel compression tester TU-15. Insert the M10-1.25 threaded adapter quick disconnect screws into the glow plug hole in the head of the engine. Fits for 6.6L Diesel Duramax engines, 2005 to present.

Function – This test adapter used with diesel compression tester TU-15, mainly used to measure the maximum pressure generated in the compression stroke of the diesel engine cylinder. Specially designed to check the compression pressure of gas in the cylinder.

Material – It is made of high quality steel and copper, advanced heat treatment process, ensure maximum strength and durability for long lasting usage. Its surface is treated with black oxidation, so that a layer of oxide film is formed on the metal surface to isolate the air and achieve the purpose of rust prevention.

[Car Test Kit] The cylinder test kit is equipped with 8 compression tools, including: 1 300PSI dual-unit instrument, 1 straight rubber cone connector, 1 bent rubber cone connector, 4 brass connectors and 1 extension hose. The whole package allows you to test the car condition easily by yourself.

[Pressure Gauge] The pressure gauge cover is equipped with double-range color coding scale for easy reading, and the accurate pressure range is 10-300 PSI. The shell is protected by anti-scratch coating and rubber protective layer to absorb impact.

[Function] The automobile engine compression tester kit is used to quickly and accurately measure the pressure on the cylinder of the gasoline engine. The gauge readings help diagnose the following problems: stuck valves, carbon deposits, cracked cylinder heads or damaged main gaskets, poor or worn piston rings, burning or damaged pistons.

ENGINE CYLINDER LEAKAGE TEST: JIFETOR cylinder leak gauge set is designed to detect a variety of common engine faults including: worn piston rings, worn valves, cracks in cylinder walls and blown head gaskets. Available with either single gauge shows % of cylinder leakage, or twin gauge manifold show cylinder leakage and cylinder pressure. Suitable for any gasoline engine with 14, 12 or 10mm spark plugs. The % gauge is a precise instrument, please handle it with care

WORKING PRINCIPLE OF LEAKDOWN DETECTOR: Once the leakage tester has been connected to one of the cylinders, compressed air (45-100psi) is fed into that particular cylinder through the built in pressure regulator. Diagnosis is made by observing the amount of leakage that is indicated on the cylinder leakage gauge and by listening for leakage at various points of the cars system. Please note: This cylinder leak tester is not suitable for shallow cylinder.

DUAL PRESSURE GAUGES ASSEMBLY: There are American style air plug, pressure regulating valve, aluminum manifold body, cylinder pressure gauge, cylinder leakage gauge, 19" long rubber nylon resin hose with 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 LOW SET.