Skip to main content


Piston ring

Item
Measurement
Qualification
Standard or New
Service Limit
Piston ring
Ring-to-groove clearance
Top
0.065−0.090 mm (0.0026−0.0035 in.)
0.15 mm (0.006 in.)
Second
0.030−0.055 mm (0.0012−0.0022 in.)
0.12 mm (0.005 in.)
Ring end gap
Top
0.15−0.30 mm (0.006−0.012 in.)
0.60 mm (0.024 in.)
Second
0.30−0.42 mm (0.012−0.017 in.)
0.65 mm (0.026 in.)
Oil
0.20−0.70 mm (0.008−0.028 in.)
0.80 mm (0.031 in.)