Detroit Diesel Oil Cooler Core Bundle - Used Take-Off

Application: Oil cooler core bundle for Detroit Diesel two-stroke inline engines (likely 53-series or 71-series — buyer to confirm). Oval stacked-plate design with steel mounting flange and integral inlet/outlet fittings. Condition: Used take-off, sold as-is as a core or rebuildable unit. Heavy external rust on the flange and oxidation on the brass plates; not pressure-tested. No OEM part number legible in photos. Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase. Used marine part sold as-is unless otherwise stated. No returns on electrical, used, special-order, or installed parts.