Pistons, Pins and Rings

Piston Diameter (Std.) 2.9520-2.9524 inches
Piston Clearance 0.0004-0.0016 inches
Piston Pin Diameter 0.7478-0.7480 inches
Piston Pin To Piston Clearance 0.0004-0.0009 inches
Piston Ring End Gap:
Top 0.006-0.012 inches
Second 0.012-0.018 inches
Oil [01]

Piston Ring To Groove Clearance
Top Ring 0.0014-0.0024 inches
Second Ring [02]

[01] -- Teikoku piston ring, 0.008-0.020 inches; Riken piston ring, 0.0008-0.0028 inches.
[02] -- Teikoku piston ring, 0.0014-0.0024 inches; Riken piston ring, 0.0012-0.0022 inches.