Is this a sign of a turbo on it's way out? It's not loud or anything and sounds great, but am worried that it may be a sign of the turbo giving up.....
Are the ones on 99's not supposed to whistle? Mine was really loud! (i can only just hear the one on the 900T when its wound up). I suppose some of this could be due to better sound proofing on the 900.nutcase said:My turbo makes a strange squeaky whistling sound. I guess it might be signs of the turbo on its way out, but it owes me no favours being quite possibly 20 years since a rebuild.