Lang Tools cylinder leakage tester CLT-2 — 2 gauges, M14 adapters, 100 PSI regulator for shop diagnostics

The Lang Tools CLT-2 is a professional cylinder leakage tester that checks how well an engine cylinder holds compressed air, using shop air and dual gauges to show leakage percentage and input pressure.

If you need a clear, mechanical way to evaluate piston rings, valves, and head gasket sealing without relying solely on compression numbers, the CLT-2 adds a direct leakage measurement to your diagnostic workflow. Built with a precision regulator, long-reach and standard M14 adapters, and two 2-1/2" gauges—one showing 0–100% leakage in color bands and the other showing PSI/bar for input air—the tool is designed for fast, repeatable checks in a professional garage or serious home shop.

How does the CLT-2 show cylinder leakage compared to a compression test?

The CLT-2 directly quantifies the percentage of compressed air that escapes from a sealed cylinder, so you can differentiate between a weak compression reading and a true sealing failure. Instead of just indicating low pressure, the leakage tester reveals whether air is bypassing rings, valves, or head gasket.

• Measures leakage in a 0–100% scale with a multicolored band for rapid interpretation.
• Uses shop air as the source—no separate pump required.
• Complements compression testers for more precise fault isolation.

What connections and gauges are included, and why do they matter?

The kit includes an M14 standard reach adapter on a 26" hose and an M14 long-reach solid adapter to fit common spark plug/insert openings. Two 2-1/2" gauges provide distinct readouts: one displays percent leakage with color zones, the other monitors input air in PSI and bar so you always know test conditions.

• M14 long and standard adapters for typical cylinder access.
• 26" hose for reach to hard-to-access plugs or test ports.
• Dual gauges: leakage percentage and supply pressure for consistent testing.

How do you use the CLT-2 safely and effectively in the shop?

Set the regulator to the recommended shop-air pressure, install the appropriate M14 adapter in the spark plug hole, and watch the leakage gauge as you pressurize the cylinder. Keep the engine mechanically at TDC and valves closed for consistent comparisons between cylinders, and monitor the supply gauge to ensure steady air input.

• Verify recommended input pressure before testing.
• Use TDC and closed-valve positions for accurate readings.
• Compare readings cylinder-to-cylinder to find relative failures.

What are the CLT-2’s build and packaging details?

The CLT-2 is manufactured in the United States and packaged compactly for storage or shipping. Its regulator and brass fittings are designed for workshop durability, and the instrument weight and dimensions make it portable enough for bench or vehicle-side use.

• Package weight approximately 1.293 kg for easy handling.
• Compact box dimensions: 5.842 L x 29.972 H x 20.32 W cm.
• Precision regulator and durable hoses/adapters for repeated use.

Who is this for: The Lang Tools CLT-2 is aimed at professional technicians, automotive diagnosticians, and experienced DIY mechanics who want a reliable, mechanical way to identify cylinder sealing problems beyond a simple compression check. If you service multiple engines, perform rebuilds, or need a repeatable diagnostic metric for rings, valves, or head gaskets, this tester provides a clear, visual measurement that integrates with standard shop air systems.