Caterpillar CAT 3126 Marine Diesel Engine Heat Exchanger Assembly

Marine cooling heat exchanger tank / cooler housing, removed from service and hand-marked "CAT - 3126" for a Caterpillar 3126 / 3126B marine application (application not verified). Fabricated rectangular steel shell with a full-length multi-bolt flange, one large approx. 3 in. spigot, a curved tube connection with two stubs at one end, and multiple small threaded bosses for sensors, vents, and drains. Condition: used take-off, untested. Repainted white with scuffs, chipped paint at the flange face, and surface rust on the flange edge, bolt holes, and bare tube ends. Tank / housing only — the internal core or tube bundle, gaskets, hardware, covers, and anodes are not included. No pressure, flow, or leak testing has been performed and none is claimed. Item will be drained and ports capped before shipping. No OEM part number is legible on this unit, so it is sold by photographs, identifiers, and dimensions. Quote is subject to final fitment confirmation by engine/transmission serial number, part number, photos, and supplier availability. 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.