Piston Ring, Engine

Piston ring
Piston ring gap mm (in)
Top ring Standard 0.20 - 0.35 (0.0079 - 0.0138)
Second ring Standard 0.37 - 0.52 (0.0146 - 0.0205)
Oil ring Standard 0.20 - 0.50 (0.0079 - 0.0197)
Clearance between piston ring and piston ring groove mm (in)
Top ring Standard 0.040 - 0.080 (0.0016 - 0.0031)
Second ring Standard 0.030 - 0.070 (0.0012 - 0.0028)