it started today, when accelerating, but not on idle, it seems to be the turbo as it sounds like its in sync with it. It makes a whistle like normal, but now has a sort of purr to it, similar sound to what you would hear on a lorry or similar, just an extra noise but wondering if its an issue. cant really describe it in any other way! just rolled over 108k. last serviced at 99k. any idea? cheers.
