- Universal Compatibility: This leak down tester is designed for all gasoline-powered 4-stroke engines in cars, trucks, motorcycles, ATVs, and imported models. Its compact design allows for easy access in tight engine bays, making it ideal for both home garages and professional workshops. - Accurate Problem Diagnosis: Eliminate guesswork with this kit that quickly identifies issues such as worn piston rings, cracked cylinders, faulty valves, and blown head gaskets. The dual 2.5" pressure gauges provide clear, real-time leakage readings ranging from 0-100%. Listen for leaks and observe pressure drops simultaneously for comprehensive diagnostics. - Durable Construction: Crafted to endure the demands of a professional shop setting, this tester features industrial-grade brass fittings, a reinforced 12" air hose, and a precision regulator. It operates effectively within a 45-100 PSI compressed air range and comes with both 14mm and 18mm spark plug adapters to ensure compatibility with various engine types. - Easy Setup for Fast Results: Streamline your engine diagnostics in just three simple steps: 1) Remove the spark plug, 2) Attach the hose to your air compressor (45-100 PSI), and 3) Review the gauge and listen for any leaks. The kit includes clear visual guides to help you troubleshoot like an expert mechanic. Specific use scenarios include: - Testing engine health in a classic car restoration project. - Diagnosing performance issues in an ATV before a weekend ride. - Assessing a truck's engine after a drop in power performance. With reliable performance and user-friendly features, this leak down tester is essential for any serious vehicle maintenance routine.