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Home >> Porsche >> 2016 >> Panamera Turbo >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 13 - Engine - CRANKGEAR, Pistons -- PANAMERA (970) >> WM 131003 Measuring Pistons (Includes Measuring Cylinder Bore) (PANAMERA S E-Hybrid, PANAMERA S Hybrid) >> Checking Piston-Ring End Clearance

Checking Piston-Ring End Clearance

  1. Slide the piston ring at a right angle to the cylinder wall from above until it is approx. 15 mm away from the edge of the cylinder.
  2. Use a piston with no piston rings to slide it in.
    Fig 1: Checking Piston-Ring End Clearance
    G09804295Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Piston ring New [mm] Wear limit [mm]
1st compression ring 0.20... 0.30 0.80
2nd compression ring 0.50... 0.70 0.80
Oil scraper ring 0.25... 0.50 Not yet determined
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