Prokomon Engine Cylinder Leak Down Tester Kit — Grey 4-piece dual-gauge set, regulator & adapters

Prokomon Engine Cylinder Leak Down Tester Kit is a four-piece dual-gauge leakdown set that helps identify piston ring, valve, head gasket and cylinder wall leaks by pressurizing individual cylinders with shop air.

This compact kit brings a professional leakdown workflow to home mechanics and light-shop users. It pairs a dual-range gauge manifold with hoses, adapters and push-on fittings so you can pressurize a cylinder and read both input pressure and percentage leakage simultaneously. Everything needed to adapt to most spark plug–equipped gasoline engines is included, though an air compressor and basic hand tools are required to prepare the engine.

How does the dual gauge system make leak diagnosis easier?

The Prokomon kit uses two gauges to show both the test pressure (0–100 psi / 0–7 bar) and the leak rate (0–100%). Reading both values at once lets you set a controlled pressure and then quantify the leakage percentage quickly. This helps you compare cylinders against each other and narrow down possible failure points.

• 0–100 psi main pressure scale; 0–100% leak indicator for straightforward interpretation
• 0.5% accuracy for consistent repeated tests
• Quick visual comparison between cylinders to spot weak compression

What fittings and accessories are included to fit different engines?

The kit expands on a basic manifold by adding several adapters and connectors to reach deep or awkward spark plug wells. You get both threaded and push-on options plus an extension rod and hose so the manifold works on compact motorcycle heads through larger automotive engines. The push-on connectors are helpful when you can’t or don’t want to remove plugs.

• Two universal push-on connectors for non-threaded access
• Two threaded adapters for standard spark-plug threads and a M14 aluminum extension rod
• Extra extension hose and durable rubber hose for flexible reach

How do I control and regulate input air safely during tests?

The manifold assembly includes an AR2000 pressure-regulating valve and an American-style air plug to attach to common compressors. The valve knob lets you dial in the required test pressure and features a pull-to-use, push-to-lock action for secure operation. Always set the regulator to the desired psi before pressurizing the cylinder and confirm gauge readings before recording results.

• Built-in pressure regulator for precise adjustment from the compressor
• Locking knob prevents accidental pressure changes during measurement
• American type air plug for reliable quick-connection to standard hoses

What tolerance and engine types is this leakdown tester best suited for?

The Prokomon leakdown kit is designed for gasoline engines that accept spark plug–style access, with an adapter fit range up to the commonly used 20 mm plug wells. The gauges and fittings are suitable for routine diagnostics and comparison testing in small shops and home garages, though extremely large or exotic engines may require specialty adapters.

• Suitable for most spark-ignition gasoline engines (plug wells within common dimensions)
• Accuracy of 0.5% supports repeatable diagnostic checks
• Not a substitute for full engine teardown — used for locating likely defects

Who is this for: The Prokomon Engine Cylinder Leak Down Tester Kit is for DIY mechanics, mobile technicians and small repair shops that need a portable, easy-to-use tool for relative cylinder health checks. It’s ideal if you want to pinpoint compression loss quickly, compare multiple cylinders, and determine whether to pursue valve servicing, ring replacement, or further head gasket inspection. Note: an air compressor and basic mechanical skills are required to use this kit safely and effectively.