SAFARI

ENGINE 22 PISTON RINGS Fig. 3 PISTON PISTON & RINGS: Fig. 3 Piston selection data : Cyl. bore dia (mm) Piston stamped sizes available for selection Standard 97.000 + 0.01 96.90/96.89/96.88 Diametral clearance between piston and bore 0.10 to 0.12 mm (Escorts Pistons) Permissible difference in weight in a set of four pistons 5 gm maximum with pin & rings. Piston pin bore in piston 36.009/36.003 mm Piston pin outside dia 36.000/35.995 mm Clearance between piston pin and piston pin bore 0.014-0.003 mm Distance from piston crown (at TDC) to cylinder mm block top surface Below the block surface 1.25 - 1.60 mm PISTON RING DATA : (Dimensions in mm) Ring Type of piston ring Width of Lateral Butt clearance groove ring clearance in cyl. bore No. groove in groove I Key stone compression ring 2.45 ± 0.015 0.117 0.20 (chrome plated steel ring) mm 0.062 0.35 ll Rectangular 2.5 + 0.070 0.095 0.20 compression ring mm - 0.050 0.50 0.35 III Chamfered oil control ring coil 4 + 0.040 0.065 0.25 backed (cast & chromium plated) mm - 0.020 0.030 0.40