ARIA

ENGINE 71 CONNECTING ROD Stage Connecting Rod small end Parent bore diameter (mm) Bush Outside diameter (mm) Standard 34H7 34.3 +/- 0.02 Standard 1 34.2H7 34.1 +/- 0.02 Max. permissible circularity and ovality of connecting rod small end parent bore 0.005 mm 0.008 mm Connecting rod small end bush inside dia. (to be finished after installa- tion) (Piston pin oiled has thumb push fit in small end bush) Ø 31.020 - Ø 31.033 mm Max. Permissible out of parallelism (bend) between connecting rod small end and big end parent bores measured at a distance of 100 mm from centre line of connecting rod big end. 0.06 mm Centre to centre distance between connecting rod small end and big end parent bores. 149 + 0.03 mm Maximum permissible twist of connecting rod 0.1 mm Connecting rod big end parent bore dia. Ø 53.69+0.019 Max. permissible taper and ovality of connecting rod big end parent bore cylindericity 0.008 mm 0.01 mm Stage Connecting Rod small end and big end par- ent bore dia. Crank pin journal dia. With bearing shell (mm) Normal 50.008, 50.047 50 -0.005,-0.02 Normal 1 49.958, 49.997 49.90 -0.005, 0.02 Repair 1 49.758, 49.797 49.75 -0.005,-0.02 Repair 2 49.508, 49.547 49.5 -0.005,-0.02 Bearing shells to be selected such that clearance is maintained as 0.011-0.065 mm Pre tension of connecting rod big end bearing shells 0.060-0.090 mm Max. permissible difference in weight of connecting rods in one engine ± 3 gms Connecting rod big end axial play 0.1 - 0.35 mm