S6 Quattro Sedan V10-5.2L (BXA) (2007)
Checking piston
-
Measure approx. 15 mm from the lower edge, at a 90 degree angle to piston pin axis using an external micrometer 75 to 100 mm.
^
Maximum deviation from nominal dimension: 0.03 mm.
Nominal dimension see Piston and cylinder dimensions.
Measuring cylinder bore
-
Using an internal dial gauge 50 to 100 mm, measure at 3 points in diagonal sequence horizontally - A - and vertically - B -.
^
Maximum deviation from nominal dimension: 0.08 mm.
Nominal dimension see Piston and cylinder dimensions.
Piston installation position
-
Identify allocation to cylinder with paint on piston crown.
Note:
^
Do not use a center punch or scribe, since the piston head coating will be damaged.
Installed location:
^
Arrows on piston heads point to belt pulley side.