I worked in the service department for a Chevy dealer 30+ years ago. Most of the guys used about a 3' chunk of heater hose with white tape wrapped around one end for a stethoscope of sorts, and always listened through the end with the tape, so of course I followed suit. For quite awhile I just assumed there was something special about the taped end until one of the guys told me if you always listen through the taped end you won't get a big glob of grease in your ear. Doh!
Anyway - works pretty good. Don't pitch that old garden hose with the smashed coupling - put it to use.
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