TU-21CYLINDER LEAK DETECTOR KIT

TU-21 Cylinder Leak Down Detector Kit – Dual Gauge Engine Health Tester

The TU-21 Cylinder Leak Down Tester is the professional’s choice for diagnosing internal engine condition more accurately than a standard compression test. Pinpoint the exact source of an engine compression issue without a costly tear-down.

🎯 Key Diagnostic Benefits

This tool pressurizes the cylinder and measures the rate of pressure loss, allowing you to quickly identify the specific source of the leak by listening for escaping air:¹

• Piston Rings: Air leaking through the oil filler cap or dipstick tube.²

   

• Intake Valves: Air leaking through the throttle body or air intake.³

   

• Exhaust Valves: Air leaking through the tailpipe or exhaust manifold.⁴

   

• Head Gasket: Air bubbling into the radiator or coming from an adjacent cylinder.⁵

   

🔧 Features & Specifications

• Dual Gauge Manifold: Provides a clear, side-by-side reading for precision diagnostics.⁶

   

  • Gauge 1 (Input/Test Pressure): Displays the air pressure being supplied to the cylinder (typically ⁷$0-100\text{ PSI}$).⁸

     

  • Gauge 2 (Leakage Percentage): Shows the actual percentage of pressure loss (marked ⁹$0-100\%$).¹⁰

     

• Integrated Regulator: Allows you to precisely adjust and set the input pressure (often $100\text{ PSI}$) for consistent and reliable testing.
• Wide Application: Compatible with most gasoline and 4-stroke engines.¹¹

   

• Spark Plug Adapters: Includes quick-connect adapters for common thread sizes:¹²

   

  • $\text{M}12 \times 1.25$
  • $\text{M}14 \times 1.5$
  • Some kits may include ¹³$\text{M}10$ as well.¹⁴

     

• Robust Construction: Features durable gauges with protective rubber boots and high-quality hoses for professional, long-term use.
• Convenience: Supplied in a blow-molded carrying case for organized storage and portability.