Porsche Workshop Service and Repair Manuals

Piston Ring: Specifications

Piston ring side clearance

Groove 1  ....................................................................................................................................................................  0.05 - 0.082 mm (0.002 - 0.003 in)
Groove 2 Mahle  .....................................................................................................................................................  0.04 - 0.072 mm (0.0016 - 0.0028 in)
Groove 2 KS  ..............................................................................................................................................................  0.05 - 0.082 mm (0.002 - 0.003 in)
Groove 3  ................................................................................................................................................................  0.023 - 0.137 mm (0.0009 - 0.005 in)

Piston ring End gap

Groove 1  ......................................................................................................................................................................  0.20 - 0.45 mm (0.008 - 0.018 in)
Groove 2  ......................................................................................................................................................................  0.20 - 0.45 mm (0.008 - 0.018 in)
Groove 3  ......................................................................................................................................................................  0.38 - 1.40 mm (0.015 - 0.055 in)