9 times out of 10, that is all that is ever used to "fix" these sorts of NVH problems The problem is, with turbochargers, there's a hell of a lot of potential for noise for a miniscule variation in mechanical tolerances. Factor in build tolerances on ductwork either side of the compressor, not to mention air-leaks, and you have got the whole set of problems.

Interesting to contrast some of the "alternative" vehicle manufacturers mentioned above; its a pretty well-known fact that the same series of Garrett turbos fitted to the TD4 FL1 hardly suffer from any of the surge issues (that, to the man in the street, is the loud "whoop" that accompanies a full-load acceleration in a high gear as the engine passes through 2500rpm), whereas the similar units on certain German (inferior calibration) cars howl dreadfully in old age, usually to be followed by terminal failure in the compressor wheel and bearings

I think that we are all aware of the shortcomings in Landrover's products, and they don't get any better (just more complex) as time goes on, but the rest of the field out there is pretty rubbish as well, they just have a better way of saying sorry with bunches of flowers and boxes of chocolates (remember the BMW engine swaps in the 1990's?) which makes it "alright" if that happens to be your persuasion - but they're no better from an Engineering perspective. The man who makes his living fixing Landrovers will never go hungry.

Well I have a pitched whistle when I accelerate, this whistle covers entirely engine "natural" noise.

LR mechanic says it's ok don't worry ... you have to worry when it doesn't whistle

LR2 2012 5000 km.

Sorry to hear about noisy turbo.
It can be fixed. F2 Sport LE Firenze Red