Originally Posted by Oranoco
Have heard it mentioned in the past that it may be due to th eturbo being out of balance. How true this is is anybodies guess
I agree, ive heard turbo's in the past that make a whistling kind of noise when the turbo is out of balance, I suppose it depends on your definition of "screaming".
I would be a bit cautious about just running it until the turbo lets go, because ive heard of people doing this in the past only to find that there turbo has shattered into pieces and thrown it's guts back into your engine - not good, and probablly would require a rebuild.