Nissan Navara STR 2006 d22 3lt turbo. Turbo is whistling very

Remember, what is heard as turbocharger noise may not be caused by a noisy turbocharger. Before replacing a turbocharger perform the following diagnosis.
A. If a loud whine or whistle is heard during acceleration and increases or decreases with rpm and load. This condition is most often the result of a loose clamp/hose at the turbocharger compressor outlet, charge air cooler inlet, outlet or at the intake manifold.

1. With the engine running at idle and the transmission in Park or Neutral with the parking brake set, feel for boost air escaping at each connection between the turbocharger compressor outlet and intake manifold. For limited access areas, spray soapy water on those connectors and look for bubbles.

2. Check the exhaust manifold and exhaust system for leaks.

I hope this helped.

Thank you,
Norse

Had this problem with my 2003 D22, not knowing what it was took it to the Nissan dealer who told me all was ok, 2 weeks later turbo came apart and destroyed the engine, have the turbo reconditioned urgently before you loose the whole engine.

Bearings sound like they are going out. Get it corrected before you lose the turbo completely.

Wtf! It's the turbo coming on and off boost! It's normal, when I got a bigger exhaust years ago you could always here my turbo more clearly whistling after that. 140000 and still goes just as hard.