Mechanic's Stethoscope

[tig1]

I would just get the one from harbor freight. Cheap and effective. PITTSBURGH AUTOMOTIVE Mechanics Stethoscope - Item 63691 / 41966 / 69913 / 63296 https://hftools.com/app63691

That's where I got mine and it seems to work well.

 

[D60]

If Eric recos a plastic jug, I'm inclined to think it works relatively well

Quoting myself, I just built one of these. I had several extra broom handles and an aluminum threaded piece with the requisite female threads that I chopped down (black piece) -- it was originally for something like a squeegee

The handle doesn't fit the mouth of the jug snugly so I drilled out a white cap and tightened it down. Even before this the rig worked well with a shop towel wrapped around the handle to take up the space, so I have proof of concept. I just wanted something more positive than slipping a shop towel in there as a place holder

 

[Exhaustgases]

I would bet a Lisle is made the same place the harbor freight one is.

 

[williamshrader]

I bought one from Harbor Freight and it fell apart quite early, so now I just use a long screwdriver.