Bosch Automotive Kent-Moore Tools J-21793-B Liner Clamp

The J-21793-B is a genuine Kent-Moore cylinder liner hold-down clamp from Bosch Automotive Tools, designed to secure a Detroit Diesel cylinder liner during servicing. It is specified for Detroit Diesel Series 53 (including V-53) and Series 71 (including V-71) engines and is listed with end-item identification for those engines, including the 5120-00-999-8618 NSN. Alternate catalog numbers associated with this tool in Kent-Moore/Detroit Diesel listings include J-21793, J-2179301, J-21793-01, J-21793B, and J-21793-B, reflecting multiple cross-references in parts catalogs. Detroit Diesel service documentation identifies J-21793-B specifically as the hold-down clamp used for cylinder liner work, ensuring the liner remains stationary during removal and installation. This tool is purpose-built for precision liner alignment within 53/71-series engines and is not a generic fastener, underscoring its role in reliable engine maintenance and rebuild procedures.