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Originally Posted by Porsche
And why is the metal blued?
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That is actually normal heat treating for OEM Subaru clutches (made by Exedy, incidentally)
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Yet, the flywheel is okay?!
Really?
This is strange. I'm not close to being an expert on these matters, but these photos raise a lot of doubts in my mind. When in doubt, I say one rules in favor of the customer and makes repairs under warranty.
Absent a plausible explanation for how CUSTOMER ABUSE could possibly account for this clutch, it must be rationally concluded that this was the result of mechanical failure uncorrelated with anything the driver may have done. Even the mechanic was, apparently, unable to account for what caused this, what the customer might POSSIBLY have done wrong to account for this damage.
I don't know diddly, but I think the OP has a strong case for full reimbursement here.
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I tend to agree, and if a BRZ came into our shop like that, we'd replace it under Subaru's wear item warranty.
I would have liked to see the flywheel and pressure plate, but I remember Honda released a service news article a few years ago about clutch failures caused by high speed downshifting.
"Here’s a typical scenario:
Getting off the freeway, you push in the clutch to coast to a stop at the bottom of the off-ramp. Thinking it’s
a good idea, you drop into 1st gear so you’re ready to take off when the light turns green. But you do it with
the vehicle still moving at a pretty good clip (far faster than you can go in first gear). There’s a big bang or
thunk, and next thing you know . . . you’re calling for a tow truck."
What happens is that the mainshaft is being driven by the wheels (and would destroy your engine if you engaged the clutch, as it's turning 10k RPM plus at this point). The clutch is splined to the mainshaft, but not being held by the pressure plate, so the centrifugal force causes it to just fly apart.
To the OP: Is it possible something like this happened?