torx and not hex? That's definitely possible, but it doesn't really matter now because I've decided I'm taking it to my indie as soon as he has time to look at it. I'm just done with it.

What pushed me over the edge was oil in a place I wasn't expecting it. When I was in there this weekend trying to get those bolts off, I noticed there was clearly oil on the other side of the turbo, nearer to the oil inlet line. I suspect this might be leaking instead/as well. I want my indie to take a look and provide some of his wisdom, having dealt with these issues in the past.

It very well might be that I could get those bolts off, but I'm not entirely convinced that's the only place oil is coming from. I want a real experienced diagnosis.

And yes, although it was a long long day, it was infinitely satisfying to start the engine back up, having disassembled the entire intake and breather system. Mission accomplished. All it cost me was an entire day getting dirty in the cold. And I guess it wasn't even really all that cold - at least I was out of the wind.
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1998 V70 AWD Turbo 180k+