970 Engine Cylinder Machining?

[StuDalziel]

Hi! I have a 2010 Panamera 4.8l tt that I bought because it had a water damaged engine. Tear down is complete, and I have the parts that need machining at Patterson Elite (http://www.patterson-elite.com). Although I just dropped the parts off today, by this afternoon Todd Patterson had a challenge for me. The block is one solid piece of aluminum (so it seems), therefore the cylinder walls are aluminum and do not appear to be sleeved currently.

The water damage bent a rod and the result was a scored cylinder, so the challenge is...how do we machine this cylinder? It seems if we follow the standard boring process, when the new pistons and rings go in, the rings will severely score the newly machined cylinder.

Does anyone have any idea how they built these cylinders at the factory and if this engine can even be machined?

Thanks!

[P.Viby]

I am not sure about the Turbo but I seem to remember that for the Turbo S they used another metal for the cylinders, it is not aluminum. 

[StuDalziel]

Yeah that is what I was thinking, and I could probably benefit by talking with someone who can speak with a factory rep, but I don't trust my local Porsche "Stealership".