Well, maybe it's a good thing I'm upgrading now....Just inspected the stock turbo and it appears to have noticeable shaft play. Enough to where it's evident the blades were just slightly starting to contacting the housing. This turbo has almost 90k miles.
I'm no expert on turbos but from what I have recently learned on the internet is that there are acceptable limits of shaft play, even on new turbos. I haven't had any issues with my stock turbo so it could be this is normal wear and by no means bad. I would need an expert opinion.
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