Check Pistons

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Using a 75... 100 mm outside micrometer, measure approx. 10 mm from the lower edge, perpendicular to the piston pin axis.
- Max. deviation from nominal measurement: 0.05 mm.
  
  Fig 1: Checking Pistons
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Grinding Dimension In mm

Piston Diameter In mm

Basic Dimension

82.924... 82.936 ⁽¹⁾

Repair Stage

82.964... 82.976 ⁽¹⁾

⁽¹⁾	Dimensions without graphite coating (thickness = 0.02 mm). Some of the graphite coating wears off .