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944 Turbocharger whine

Engine

Vehicle Information: Model(924/944/968): 944 turbo; Year: 1989; Body Type: Coupe; Total Mileage: 80,000;

While I was out for a drive today I started noticing a very high pitch but not loud whining coming from the engine. My wife descibed it best that it sounded like a falcon call. Anyway, The high pitch whine was constant but sparadic. I tried to figure out what it possibly could be when I noticed it occured at certain points on the turbo boost meter on the dase. The sound was there when it was just above .4 to about a little under 1 bars. Above or below it did not make any noise. But the noise was noticable every time between those bar readings. Is this the start of the end for the turbocharger? What is the average life of one? Is this something that can be repaired? Or am I looking at the wrong area?

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