Turbo Whistle Noise When Accelerating

Hello fellow diesel enthusiasts!

For the past 3 weeks, I've been having a problem with my Golf III TDI, 90 horsepower, manufactured in 1994, with 240,000 kilometers on the odometer.

It started with a whistling sound when accelerating from low RPM. Two days later, a hissing, crackling noise was added at higher RPM.

In the workshop, an air hose to the turbocharger was replaced. This eliminated the noise at higher RPMs ( >3000 RPM). However, the 'turbine-like' whistling sound still persists. The (VAG) workshop said that this is not so concerning. However, I have read in the forum that a whistling turbocharger is often a sign that it is about to fail.
Now, I'm naturally a bit concerned, especially when it comes to further trips with the car .
Okay, here's the translation:

'I'm trying to describe the whistling sound in more detail: It occurs almost synchronously with the engine speed, but with a certain delay. Therefore, it doesn't sound like a turbocharger. The whistling seems louder when the engine is cold. When driving at a constant speed/RPM, no whistling can be heard. Also, I can't perceive any whistling at engine speeds above 3500 RPM. It's most noticeable when accelerating, especially at lower RPMs. I've been driving like this for about 1000 km now, and the condition hasn't changed.'

Should I be worried , can I continue driving without any concerns? Can I do something good for the turbocharger, for example, by taking it on a longer drive at a higher RPM? - I'm quite at a loss .

Greetings.

Albert.

A turbocharger, due to its operation, always produces a certain noise, which also depends on the engine's load, as you mentioned. A relatively high-frequency whistling sound is present in all the vehicles I've driven, and it's generally not an indication of an imminent turbocharger failure. However, hissing sounds suggest leaks, which apparently have already been fixed by the VW workshop.

Yes, I agree.
High-frequency whistling without any additional noises is normal.

as soon as there are any other sounds added.
like fluttering, screeching, and gliding.
(difficult to describe)
and the cart no longer accelerates evenly.
It's time!

It took me 3 months.
until my friendly neighbor agreed to it.
and replaced the charger under the warranty

Hello Adi,

I own the same Golf, now with 270,000 km. My turbo has been whistling exactly as you described for about 60,000 km.

Don't worry too much, mine is still running!

Regards,
I'm sorry, I don't understand. Can you please rephrase your request?

THANKS for the 'reassuring' comments. Now I'll approach the whole thing with more calmness and won't rush into an expensive repair (replacing the charger). Especially since, since the load-dependent whistling started, no further negative effects have been noticeable.

- No loss of performance (acceleration, top speed (190 km/h)).
- no soot
- no increased fuel consumption (5.3 L / 100 km)

Of course, one wouldn't want to invest too much money in a car with this mileage (240,000 km).

Thank you again.

Albert.