7.3 Water Pump. Anyone use a mechanic's stethoscope to check one?

[glennhansel]

If so, is it possible to hear the bearings and determine whether or not they are going bad above the noise of the diesel engine?


Thanks in advance

[late_99_PSD]

Yeah if you had a stethoscope then you coud hear it. Or you can see if theirs any play in the bearings by rocking the fan.

[ianstew]

trying to rock the fan is how i tell

[glennhansel]

Thanks. Does anyone know the amount of play which is "acceptable"? With the serpentine belt off, I was able to slightly move the fan back and forth, maybe (just guessing) 1/25 of an inch. When I put the belt back on, I was not able to rock the fan back and forth at all, so I'm pretty sure the movement is in the water pump shaft.

I appreciate everybody's input.

[ianstew]

When i redid my water pump i dont remember any play at all on the new pump.