Lang Tools cylinder leakage tester CLT-2 — 100 PSI dual-gauge kit with M14 adapters and 26" hose

Designed for technicians and home mechanics, the CLT-2 provides a fast, reliable way to determine how well a combustion chamber holds pressure. Instead of relying solely on compression readings, this tool introduces controlled shop air into the cylinder and displays leakage as a percentage on a dedicated gauge while a second gauge monitors input air pressure. Built with an adjustable regulator, M14 adapters, and a 26-inch hose, the CLT-2 is compact, portable, and made in the United States.

How does the CLT-2 measure cylinder leakage?

The CLT-2 feeds pressurized shop air into the cylinder through a threaded M14 adapter while an accurate leak gauge registers the percentage of air escaping. A precision regulator lets you set the input pressure up to 100 PSI, and the leak gauge uses a multicolored band to quickly interpret low, moderate, and high leakage readings.

• Precision regulator controls air input up to 100 PSI
• M14 standard reach adapter and M14 long reach solid adapter for varied spark plug depths
• 26" hose assembly for flexible access to engine bays
• 2-1/2" leakage gauge with 0–100% scale and color zones for quick evaluation

What do the two gauges show and why are both useful?

One 2-1/2" gauge displays leakage as a percentage with a visual color band to help interpret results at a glance. The second 2-1/2" gauge shows input pressure in PSI and bar so you can confirm steady supply pressure while testing, which improves consistency and repeatability of readings.

• Leakage gauge: 0–100% range with multicolored band (low, moderate, high)
• Supply gauge: dual-scale PSI/bar to monitor shop air pressure
• Simultaneous readout reduces guesswork and misdiagnosis

Which adapters and hose features make the CLT-2 practical?

The CLT-2 arrives with both a standard M14 reach adapter on a 26" hose and a long-reach solid M14 adapter to handle a variety of spark plug well depths and engine layouts. The hose length and rugged fittings let you reach tight or deep spark plug locations without improvised extensions.

• M14 standard reach adapter on a 26" flexible hose for access and maneuverability
• M14 long reach solid adapter for recessed spark plug locations
• Durable fittings and regulator for shop-grade reliability

How does this tool fit into routine diagnostics?

The CLT-2 is used alongside a compression test to pinpoint where pressure is escaping — valves, piston rings, or head gasket. By quantifying leakage in percentages and keeping input pressure stable, the CLT-2 helps prioritize repairs and identify the likely failure area before disassembly.

• Complements compression testing for clearer diagnostics
• Quickly isolates leak paths to valve train, rings, or head gasket
• Reduces unnecessary teardown by focusing inspection areas

Who is this for: The Lang Tools CLT-2 is ideal for professional mechanics, small repair shops, and serious DIYers who perform engine diagnostics and want a compact, dependable cylinder leakage tester. Its dual gauges, adjustable regulator, and two M14 adapters make it versatile across most gasoline engines; the kit’s compact packaging and U.S. manufacture suit busy service bays and mobile technicians.