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PT98 Making loud whining noise under pressure. I tested for boost leaks,exhaust leaks no noticeable play in shaft up or down shaft spins freely. My question is has anyone had this problem and what solved it.
 

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Another precision turbo on a clients car made a similar sound as your describing and then failed a few hundred miles later. Turbo made great power right up until death. Not exactly sure what it ended up being.
 
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