JEGS Compression & Leak-Down Testers

Gauge the Compression of Critical Engine Components

A JEGS Compression or Leak-Down Tester will equip you to diagnose failed or leaking valves, pistons, rings, and head gaskets through the spark plug, glow plug, or injector ports. Our testers offer easy-to-read gauges, high PSI capabilities, and adapters for most import and domestic vehicles, making them a must-have addition to your tool arsenal.