Noisy bearing on the Ferrari 308

Been a while since I've posted.

I started my GT4 up yesterday after about 3 weeks of not running it and got a kind of tinkling, clicking, rattling noise. Difficult to describe, but sounded like a well worn and/or dry ball bearing.

I did the cam belts about 18 months ago and fitted new non-genuine tensioner bearings. One of the tensioners I pulled off was free running - had that dry/loose bearing feel when you spun it - but I didn't know this until I pulled it off so it wasn't making any grumbling sounds. The two new bearings were as they should be with no spin-on if you held the inner race and tried to spin the outer. Thus I don't think it could be the tensioners - I'll be putting some Hill Engineering ones on though at the next belt change as they are pretty cheap really.

So the question - does this sound like worn out water pump bearing(s) or generator bearing(s)?

Finally, the sound can clearly be heard at the belts end but gets less and less and a few minutes after starting is gone. When I started the car today there was very little evidence of it - but it was still there a little just after start-up.

I'll pull the generator/pump belt tomorrow and start the engine and see. That should quickly eliminate it, although it seems to be more apparent the longer I leave the car between runs.

Neither the water pump or generator have been touched since I've owned the car (4 years) so they are my prime suspects.

Watch this space.