"Oppie" > wrote in message
...
> "Private" > wrote in message
> ...
>>
>> I recommend you use a proper mechanics stethoscope, the kind with a rod
>> attached to a small diaphragm. Touch the rod to suspected problem areas
>> while engine is running. It will really isolate sounds like bad
>> bearings. They are not expensive and are often available @ cheap tools R
>> us. In a pinch a short length of hose held to one ear can also be very
>> helpful.
>>
>> Good luck YMMV
> I had taken a long screwdriver putting the handle to my ear and touching
> the long blade to bits and pieces.
> Two problems though -
> Can't quite see the blade while handle it to ear. Best to place it and
> then put ear to handle.
> Wife asked why I had a perfect circle of grease in my ear. Best to wipe
> down the messy handle before using in this manner...
>
> The engine with all it's solidly mounted accessories is a huge sounding
> board. Sounds are pretty readily coupled throughout the package which
> makes localizing a bit difficult.
>

You need to try a proper diaphragm type stethoscope to realize just how good
they really are. The screwdriver in the ear can be helpful as is the length
of hose, but IMHO, neither come close to a diaphragm stethoscope.

Just my .02