Over the past week when i'm stopped near buildings/objects that reflect sound, etc, or cars stopped next to me at the lights, i've been heading a 'tinkling' metal-on-metal kind of noise, it's coming from the left hand side of the car as far as I can tell - and gets slightly louder by 0psi (from -20ish vaccum/idle), and then disapears.
It is only really noticable at idle and very low (<2000) revs.
At the moment, my theory is the turbo is shot... bearings or something, it's just a good 'olde ceramic r33 s2 stock turbo.
Is this the sort of thing i should stop driving straight away, or is it just likely a worn bush or something that will be fine lasting a few weeks until I organize a replacement? Not sure if this is a common symptom, although I know these turbos can shatter which worries me.
Cheers as always