Prokomon Engine Compression Tester Kit, 11pc with Dual-Scale Gauge (PSI/BAR) — Brass Adapters & Carry Case

Prokomon 11pcs Professional Engine Compression Tester Kit is a complete, workshop-ready set that measures cylinder compression precisely with a dual-scale gauge and multiple adapters for most gasoline engines.

This compact kit gives technicians and DIY mechanics a dependable way to inspect internal engine condition by measuring cylinder pressure. Built for garage use, the set combines a large, easy-to-read dial, a protective rubber boot, a selection of brass adapters, extension connectors, and a carrying case so tests are repeatable and components stay organized. It is intended for petrol engines only (not diesel).

How accurate and readable is the gauge for routine diagnostics?

The Prokomon gauge uses a dual-scale dial calibrated in PSI (0–300) and BAR (0–20), making it simple to interpret results whether you prefer imperial or metric units. The acrylic face resists impact and the rubber boot cushions the gauge during workshop use, improving visibility and longevity. A built-in check valve retains peak pressure so you can read the highest compression recorded without rushing.

• Dual-scale dial: PSI and BAR for flexible readings
• Acrylic cover plus rubber boot for durability
• Integrated pressure-retaining check valve for peak reading

Which engines and vehicles will this kit work on?

This compression tester is designed for most gasoline-powered engines, covering cars, light trucks, motorcycles, ATVs and small engines such as lawn mowers. The adapter selection includes common spark-plug thread sizes and options for deep wells, plus rotary and push-in adapters for broader compatibility. Note: it is not suitable for diesel engines, so confirm your engine type before testing.

• Adapters: M10, M12, M14, M16, M18 for common spark-plug threads
• Includes rotary and push-in adapters for varied fittings
• Compatible with cars, bikes, ATVs, lawn mowers (gasoline only)

What accessories come in the kit and how do they help reach tricky cylinders?

The Prokomon kit includes five brass/metal adapters, a 200mm metal extension connector, two 50mm aluminum rods (straight and bent) and a flexible extension hose to access recessed or awkward spark plug locations. These parts let you adapt the tester to shallow or deep wells and angle around engine components without forcing connections. A blow-molded carrying case keeps everything secure and ready for mobile or shop work.

• 200mm metal extension for deep spark plug wells
• Straight and bent 50mm rods to clear obstructions
• Flexible hose for hard-to-reach cylinders and tidy storage case

How do I interpret compression readings and what issues can this test indicate?

Regular compression testing helps detect problems like worn piston rings, leaking or burnt valves, head gasket failure, carbon buildup and cracked cylinder heads by comparing measured pressure across cylinders. Look for consistent values between cylinders—significant variation or low absolute numbers suggests internal wear or sealing issues. Use the retained peak reading to compare against manufacturer specs or a known-good cylinder.

• Compare cylinder-to-cylinder variance for imbalance detection
• Low readings can point to rings, valves or head gasket issues
• Use peak-hold valve to capture maximum pressure for comparison

Who is this for: The Prokomon 11pcs Professional Engine Compression Tester Kit suits mechanics, mobile technicians and serious DIY enthusiasts who need reliable, repeatable compression readings for gasoline engines. It's ideal for routine diagnostics, pre-purchase inspections, and troubleshooting performance or starting issues where internal cylinder sealing needs to be verified. If you work on diesel engines, choose a purpose-built diesel tester instead.