Piston Ring, Engine

Number of compression rings 2
Number of oil control rings 1
Top compression ring width 2 mm - (0.0781 in) nominal
Second compression ring width 2 mm - (0.0781 in) nominal
Oil control ring width Self expanding
Top compression ring thickness 4.35 - 4.60 mm (0.171 - 0.188 in)
Second compression ring thickness 4.35 - 4.60 mm (0.171 - 0.188 in)
Side clearance (ring in groove)
Top compression ring 0.038 - 0.089 mm (0.0015 - 0.0035 in)
Second compression ring 0.038 - 0.089 mm (0.0015 - 0.0035 in)
Oil control ring Self expanding

Ring Gap (fitted in bore)
Prior to VIN 8L103481
Top ring 0.38 - 0.51 mm (0.015 - 0.020 in)
Second ring 0.23 - 0.35 mm (0.009 - 0.014 in)
Oil control ring 0.38 - 1.14 mm (0.015 - 0.046 in)

From VIN 8L103481
Top ring 0.38 - 0.51 mm (0.015 - 0.020 in)
Second ring 0.41 - 0.66 mm (0.016 - 0.026 in)
Oil control ring 0.31 - 0.61 mm (0.012 - 0.024 in)