Piston Ring, Engine

Piston ring width
Compression (top) 1.47 - 1.49 mm
Compression (bottom) 1.46 - 1.49 mm
Oil ring service limit (Side clearance) 0.15 mm MAX.
Ring gap
Compression (top) 0.25 - 0.28 mm
Compression (bottom) 0.25 - 0.28 mm
Oil ring (steel rail) 0.04 - 1.68 mm
Side clearance
1st ring 0.04 - 0.08 mm
2nd ring 0.04 - 0.09 mm
Ring groove width
Compression (top) 1.53 - 1.55 mm
Compression (bottom) 1.53 - 1.55 mm
Oil 4.008 - 4.032 mm
Ring to ring groove clearance
Compression ring (top) 0.04 - 0.08 mm
Compression ring (bottom) 0.06 - 0.09 mm