Can anyone help. I'll try to describe: Recently I have noticed that when the car starts cold and it does it's usual swooosh sound but it also has a loud rattle that almost sounds like the belt or alternator gone bad. It sort of reminds me in a way of my '78 911SC before the alternator went toast. There is also a whining sound but I think that's farily normal. The belt was just replaced a few weeks ago and I checked it and it's appears with normal tension so that's not it. It only does this upon cold start with the high rev. Anyone ever experience this? I'm worried. The voltage gauge seems normal too.
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