Hazet-2151-Engine-s-Stethoscope-1080mm-Hazet-2151-The-Hazet-2151-Engine-s-Stethoscope-1080mm-can-quickly-locate-the-source-of-engine-noise-such-as-piston-slap-worn-gears-&-bearings-damaged-valves-water-pump-failure-&-blown-gaskets-This-well-designed-scope-is-also-useful-for-tracking-down-dashboard-rattles-&-squeaks-Hazet-2151-Engine-s-Stethoscope-1080mm