I think you misunderstood.
The engine needs to be taken out 0.010 with the 0.010 oversize pistons to overcome the piston slap problem.
The piston to bore clearance was set incorrectly from the factory, which is why it develops this problem.
If you log onto ****, you will find a discussion on this topic which may assist you in your own diagnosis of this problem.
Dr. Hundi
http://www.****/index.php?showtopic=1029