Audi TT Platform 2009 - Crankshaft;Cylinder Block - 4-Cylinder - Turbo Engine - 2.0 L - CCTA (Continued); Piston Ring End Gaps; Piston Ring Clearance; Piston and Cylinder Dimensions

26 Audi TT Quick Reference Specication Book • May 2009
Piston Ring End Gaps
Piston ring Gap
New Wear limit
Compression ring mm 0.20 to 0.40 0.8
Oil scraping ring mm 0.25 to 0.50 0.8
Piston Ring Clearance
Piston ring Ring to groove clearance
New Wear limit
Compression rings mm 0.04 to 0.08 0.15
Oil scraping ring mm 0.02 to 0.06 0.15
Piston and Cylinder Dimensions
Honing dimension Piston diameter Cylinder bore
diameter
Basic dimension mm 82.465 * 82.51
* Dimension without graphite coating (thickness 0.02 mm). The graphite coating
wears away.