TM 9--2815--247--34 0059 00--6 CYLINDER HEAD ASSEMBLY REPLACEMENT -- CONTINUED 0059 00 Installation NOTE Do not remove crankcase protectors until connecting rods have been removed or cylinder head assemblies are be- ing reinstalled. The pistons (11) are marked for identification to aid in installing the pistons in the proper position. The piston pin boss is stamped with an arrow and the cylinder head assembly location to identify the cylinder from which the piston was removed and to assure piston will be returned to its original cylinder head assembly. The arrows on the piston pin bosses are pointed up, or to exhaust port. Cyl- inder head assemblies (1) are stamped with position markings at the intake valve side (bottom) of valve rocker arm cover flange. Markings of any piston or cylinder head assemblies must be renewed if position marks and/ or arrows are not entirely legible. Replacement piston must be marked to the corresponding cylinder head as- sembly it is to be used with. Always keep piston pin with its respective piston. Wash cylinder bores thoroughly just prior to engine as- sembly, using a power brush with hot 160°F (71°C) soapy water. Cylinder bores should then be oiled to prevent rust. Figure 8 EXHAUST PORT SIDE OF PISTON INTAKE PORT SIDE OF PISTON 1 11