With a long pry bar or screwdriver where you head isn't next to the engine, can't that be just as good or better than a stethoscope? I wouldn't buy one except I inherited my wife's professional grade when she got her Master Cardiological unit. Of course i got to try it out when we lived in the apartments and can tell you that the MC one is much better than the regular professional one, both being made by Littmann. The MC one is better for listening to softer voices and/or sounds, but I digress.
