- Universal fit for cars, trucks, and small engines Diagnose any gasoline-powered vehicle with confidence. This leak down tester works seamlessly on 4-stroke engines in cars, trucks, motorcycles, ATVs, and imported models. Compact design ensures easy access even in tight engine bays, making it ideal for home garages and professional shops. - Pinpoint engine problems with no guesswork Stop wasting time on trial-and-error fixes. This kit detects worn piston rings, cracked cylinders, faulty valves, and blown head gaskets with precision. The dual 2.5 inch pressure gauges deliver clear, real-time leakage readings (0 scale), so you hear leaks (hissing from valves/exhaust) and see exact pressure drops. - Built for reliable, repeatable results Built to withstand shop rigors, this tester features industrial-grade brass fittings, a reinforced 12-foot air hose, and a precision regulator. Withstands 45100 PSI compressed air input and includes a 14mm/18mm spark plug adapter — no flimsy parts or false readings. - Faster diagnostics – even for beginners Master engine checks in 3 steps: 1) Remove the spark plug. 2) Connect the hose to your air compressor (45100 PSI). 3) Read the gauge and listen for leaks. Includes visual step-by-step guides to troubleshoot like a seasoned mechanic. - Practical use scenarios - Pre-purchase inspection of a used vehicle to assess engine integrity before buying. - Routine maintenance diagnostics for cars, trucks, motorcycles, ATVs, and imported models in a home garage or shop. - Diagnostics of small engines such as lawn mowers, generators, snow blowers, or other gas-powered equipment.