ENGINE 53 F. Crankcase : Height of Crankcase (Dimensions A and B) 311 ± 0.1 mm Maximum permissible unevenness of cylinder block ( Lengthwise 'C' ) mating surface with cylinder head 150 X 150 ( Crosswise 'D' ) 0.03 mm 0.015 mm Maximum permissible out off parallelism between cylinder block top and bottom machined surface. 0.03mm Maximum permissible shift in perpendicularity of cylinder bore from crank shaft axis when checked at 200mm from crank shaft center line. 0.04mm Maximum permissible circularity 0.01mm Ovality of cylinder bore (Cylindricity) 0.01mm
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