turbo making odd noise

OK guys back on topic. I am afraid to ask this question in fear of getting an answer.

My turbo seems to be ok under all conditions except when your foot is to the floor. When accelerating hard I hear a very loud whining noise that sounds kinda like a bad bearing. But whats odd is it only does it under full throttle. Stock boost, stock everything.67k on the clock. Should I check for shaft play? How woudl I diagnose this problem? Thanks in advance!

This is also normal. Although you need to be at certain RPM to boost since you need enough exhaust gases to spin the turbo wheel, you could also slowly get your car to 6500 RPM without buiding boost by modulating you thottle. Unless you are seeing blue smoke or there is oil on your turbo (could be an O-ring), I would not worry about it.
 

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