I haven't noticed it before but after I balanced the TBs I have what sounds like a loose rubber belt noise / small bird squeaking from the exhaust
It's noticeable from idle and particularly if I blip the throttle
As the only belt is on the alternator and that's at the front and this noise seems to be from the exhaust I'm wondering if balancing the TBs could create a resonance or something ?
I haven't looked at the Alt belt yet but the noise isn't coming from the front