Prokomon Engine Cylinder Leak Down Tester Kit - Dual Gauge Leakdown

In this review of the Prokomon Engine Cylinder Leak Down Tester Kit the bottom line is clear: this is a practical, workshop-ready leakdown set for DIY mechanics and professional technicians who need a reliable way to isolate cylinder faults. It connects to a shop air source and uses a dual gauge to show both input pressure and percentage leak, which makes diagnosis of worn rings, leaking valves, cracked cylinders or head gasket failures straightforward. The kit's added adapters and M14 extension rod expand compatibility, so it is useful right out of the box for most gasoline engines with spark plugs up to 20mm.

Key Features

• Dual gauge display: Simultaneous pressure and leak rate readouts let the user compare input psi and percentage leakage without switching tools.
• Wide measurement range: The gauges cover 0-100 psi and 0-100% leak rate with 0.5% accuracy, which is adequate for routine engine diagnostics.
• Comprehensive adapter set: Included push-on connectors, threaded adapters and metal fittings enable use on most petrol engines with standard spark plug wells.
• Extension options: The M14 aluminum extension rod and extra hose let you reach deep or recessed spark plug holes when the tester would otherwise be too short.
• Manifold with regulator: The manifold assembly includes an 18 in hose and an AR2000 pressure regulating valve for controlled, repeatable tests.

Who It's For

The kit is aimed at home mechanics, small repair shops and anyone who performs routine engine troubleshooting. A user with an air compressor and basic mechanical skills will find the dual gauge and accessory pack a quick way to confirm piston ring wear, valve leakage or head gasket issues.

It is not ideal for diesel engines or situations that require manufacturer-specific adapters beyond those provided, and buyers without an air compressor will need to supply one separately to use the tool.

Pros & Cons

Pros

• Dual gauges provide clear simultaneous readings of pressure and leak percentage for faster diagnosis.
• Multiple adapters and an M14 extension rod improve fitment across a wide range of gasoline engines.
• Manifold with regulator and lockable valve knob offers controlled input pressure and repeatable testing.
• Push-on connectors let you attach without threading into delicate spark plug wells when access is limited.

Cons

• Requires an external air compressor; the kit does not include a compressor.
• Not configured specifically for diesel applications and may need extra adapters for unusual engine types.

Specifications

Brand	Prokomon
Gauge ranges	0-100 psi / 0-100%
Accuracy	0.5%
Included adapters	2 metal adapters, 2 push-on connectors, 2 threaded adapters
Extension	1 M14 aluminum extension rod and 1 extension hose
Manifold	Double gauge manifold with 18 in hose and AR2000 regulator

Our Verdict

The Prokomon leak down tester kit is a solid, cost-effective diagnostic tool for gasoline engine troubleshooting that balances useful accessories with a clear dual-gauge layout. For DIYers and small shops that already have an air compressor, it delivers good value and expands diagnostic capability without specialized equipment; those needing diesel coverage or built-in air supply should consider alternatives.

Frequently Asked Questions

Can I use this on diesel engines?
Answer. The kit is designed for gasoline engines with spark plugs up to 20mm; diesel engines typically need different adapters and are not the intended application.

Does the kit include an air compressor?
Answer. No, the tool hooks to an external air compressor which must be provided separately.

Will it fit recessed spark plug wells?
Answer. Yes, the M14 extension rod and extension hose help reach deep or recessed wells, and push-on connectors reduce threading needs.