I5 turbo valve guides

[a4kcstq at comcast.net]

My question is about reaming new valve guides in the I5 turbo engine.  The Bentley refers to VAG tool number for the reamer, but it doesn't mention the size anywhere.  Does anyone have this information?

The valve stems mic out at 0.3140 for the intakes and 0.3125-0.3130 for the exhaust.  The exhaust stems are actually tapered with the thinner end near the valve.  I assume this taper and the difference between the intakes and exhaust sizes is to account to thermal expansion of the stems.  The stems don't appear to be worn.

I've seem recommendations for valve stem to guide clearance anywhere from .001" up to .005".  Anybody have a specific number for the Audi I5 turbo heads?  TIA!

-Peter Lines