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Home >> Subaru >> 2021 >> Outback Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Mechanical System (2.4L)) >> General Description >> Specification >> Piston Ring

Piston Ring

WARNING: This page is about a different variant/trim than selected.
Closed gap mm (in) Compression ring Top ring Standard 0.22 - 0.27 (0.0087 - 0.0106)
Second ring Standard 0.35 - 0.45 (0.0138 - 0.0177)
Oil ring (Upper rail and lower rail) Standard 0.10 - 0.35 (0.0039 - 0.0138)
Clearance between compression ring and piston mm (in) Top ring Standard 0.040 - 0.080 (0.0016 - 0.0031)
Second ring Standard 0.045 - 0.085 (0.0018 - 0.0034)