Cast Iron Square-Flange Water Passage Cover / Spacer Housing - Used, Unidentified

Used cast-iron square-flange cover / spacer housing off a marine diesel engine, finished in marine green paint. Twelve-bolt outer flange with a machined square inner port, inner six-bolt pattern, and two plugged/fitted bosses — consistent with a heat exchanger end cover, water passage cover, or flanged spacer.

Application: Not verified. No legible manufacturer name, data tag, or OEM part number is present on the casting, so the engine model and application cannot be confirmed. It may fit a Detroit Diesel or other marine diesel cooling-system assembly; buyer must confirm.

Condition: Used take-off, untested. Chipped and faded paint, old gasket residue on the flange faces, light surface rust and green corrosion on the water side. Not pressure tested or crack tested. Appears complete as pictured. Will be 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.