Marine Bronze Heat Exchanger / Aftercooler End Cap Water Housing Cover 3-Bolt With Hose Spout - Used

Bronze marine end cap / water housing cover with 3-bolt flange, machined O-ring sealing land, internal flow-divider rib, and single hose spout. Casting number 30524 1027 B is cast into the interior — this is a casting number, not a confirmed OEM service part number, and no manufacturer marking or data plate is present.

Application: Not verified. Configuration is consistent with a raw-water end cap / header bonnet from a marine heat exchanger or aftercooler, but the engine make and model it came from have not been confirmed. Sold by photographs, casting number, and dimensions.

Condition: Used, untested take-off. Paint heavily chipped with oxidation, verdigris, and raw-water scale. No cracks visible in the photographs; sealing faces have not been machined or pressure-tested. Small cast boss near the flange appears broken/cut — see photos. No gaskets, O-rings, or hardware included. Drained and ports capped before shipping.

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.