Identification Of Pistons
WARNING: This page is about a different car, the 2014 Porsche Cayenne, 2013 Porsche Cayenne, 2012 Porsche Cayenne, and 2011 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.
Information
The piston is identified as a spare part by the following characteristics: one dimensional group X, Naturally aspirated or Turbo, cylinder bank.
The piston is installed as standard in two additional weight tolerances: + and -.
This information is all engraved on the piston crown. To identify the piston uniquely, the piston must be cleaned carefully (brass brush, ultrasound bath).
Markings on piston crown: Replacement pistons are only available from the Porsche Parts Service in one dimensional group 'X' and in two weight tolerances '+' and '-'.
If the weight class/dimensional group cannot be determined, the components (piston with piston rings, pin and circlip) must be weighed.