Piston Ring, Engine

Ring Gap Clearance
Top Compression Ring 0.229 to 0.610 mm (0.0090 to 0.0240 in.)
2nd Compression Ring 0.483 to 0.965 mm (0.0190 to 0.0380 in.)
Oil Control Steel Rails 0.254 to 1.500 mm (0.010 to 0.060 in.)
Ring Side Clearance
Compression Rings 0.042 to 0.084 mm (0.0017 to 0.033 in.)
Oil Control Ring 0.06 to 0.21 mm (0.0024 to 0.0083 in.)
Piston Ring Groove Height
Compression Rings 1.540 to 1.555 mm (0.0602 to 0.0612 in.)
Oil Control Ring 4.035 to 4.060 mm (0.1589 to 0.1598 in.)
Piston Ring Groove Diameter
Compression Ring 87.78 to 87.90 mm (3.456 to 3.461 in.)
Oil Control Ring 87.50 to 87.75 mm (3.445 to 3.455 in.)