View on LOZ Suggested Retail: $34.97. . Cylinder Leak Down Tester, Compression Test kit - Engine Cylinder Dual Gauge Leakdown Tester kit Diagnostics Tool. Designed to detect a variety of common engine faults such as worn piston rings, cylinder head cracks, worn valves and blown head gaskets. It checks the amount of leakage in an engine cylinder and helps determine the source. Gauge scale displays percentage of cylinder leakage and cylinder pressure. Pressurized air is supplied to each cylinder and in moments displays a rate of leakage measure from 0 to 100% Suits all local and imported cars and trucks, designed to check the amount of leakage in 4-stroke engines. Ideal for testing trucks and car models where clearance is minimal. This is a high quality TU-21 cylinder leak detector, including double gauge system, 2-1/2'' input pressure gauge, snap-on quick connect male connector, gauge scale 0-100 PSI, 12mm, 14mm spark plug adapters, air regulator and carry case. Specifications: Condition: 100% Brand New Material:  Rubber, hardware Color: Red (Shown as picture) Spark plug adapter: 12mm, 14mm Gauge scale: 0-100 PSI Package Weight: Approx. 1836g. 7 CALENDAR DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 CALENDAR DAY STORAGE IS ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.