Nozzle grinder and tester, this equipment was designed to verify the physical condition of the ISX injector nozzle corresponding to the HPI system, focusing exclusively on the check valve and the cavity where it is located. Using compressed air, it checks for leaks between the base or seat and the valve itself. It also allows measuring the valve’s opening pressure to ensure the valves are in good condition. Similarly, it enables the rectification of the cavity seat, as any roughness or cracks could lead to improper injector operation.