Auto Diagnostic Test Tools Mechanical Testers Car Engine Block Mechanic's Stethoscope Automotive Tools Auto Repair Tools

Works great for finding water leaks in walls and floor as well as for isolating engine knocks in car engines

I used it to find a noise in my engine that came and go. I was able to track it down to an idler pulley that was worn out. It is great for anything at is running and making noises and you could pin point the problem.