Mechanic's Stethoscope Identify Piston Slap, Worn Gears, Faulty Valves, Water Pump Failure, Damaged Gaskets and Defective Bearings Stethoscope Has a Shock-Resistant Handle and Disassembles for Storage Stethoscope Locates the Source of Engine Noise Quickly Listen for Trouble By Tracing the Sound of Flowing Water, Oil, Gas or Steam