Quote:
Originally Posted by john.wigley
I've always had more joy using a stethoscope of some sort .
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Me too - I bought a proper mechanic's stethoscope, it was only around a fiver, and money well spent. The probe is long, and in the unfortunate event that it gets caught in something rotating, at least your face and hands are well away from the danger, and it transmits the sound really well and works superbly.
Another vote for running it briefly with the aux belt disconnected. If it's quiet then, you know what area to concentrate on and the stethoscope will tell you what device is whining.