Piston - Cleaning and Inspection for Reuse (1-20) Section 1 - Cylinder Block - Group 01 M11 Page 1-60 Caution: Do not use a metal brush to clean the piston. The ring grooves will be damaged. Do not use glass beads to clean the grooves. Walnut shell or plastic bead, Part No. 3822735, blasting can be used on ring grooves on the dome and crown of the piston. Use the minimum effective pressure, and do not concentrate the spray in one area for an extended period of time. Use a brass or non-metallic brush to clean the piston ring grooves. Repeat the soaking and scrubbing process until the pis- ton is cleaned thoroughly. Warning:
When using a steam cleaner, wear protective clothing and safety glasses or a face shield. Hot steam will cause serious personal injury. Use steam to clean the solvent from the piston and dry with compressed air. Inspection Visually inspect the piston bowl (1) and crown piston pin bore (2) for cracks or damage. Do not use a piston with cracks. Visually inspect the piston gallery cover plate in the piston crown for cracks. If the cover plate has a radial crack (1), the crown can be reused. If the cover plate has a circumferential crack (2), the piston crown must be replaced.