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Home >> Porsche >> 2017 >> Panamera Base >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 13 Engine - Crank Drive, Pistons 3.0L Turbo -- 971 - PANAMERA (971) >> WM, 131003 Measuring Pistons (Includes Measuring Cylinder Bore) (V6 Turbo) >> Measuring Piston-Ring End Clearance

Measuring Piston-Ring End Clearance

  1. Insert piston ring into the cylinder from the top to about 15 mm from the lower edge of the cylinder at a right angle to the cylinder wall.

    Use a piston with no piston rings to slide it in.

  2. Measure piston-ring end clearance.
    G15821339Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Piston-ring end clearance

    1. 2.1 Guide a feeler gauge into the gap on the piston ring and determine the value > Piston-ring end clearance 
      Piston ring New in mm Wear limit
      1st compression ring 0.15-0.25 0.35
      2nd compression ring 0.30-0.45 0.55
      Oil scraper ring Cannot be measured -
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