5112890090 511289-0090 5-11289009-0 Ex100 4Bd1 Oil Radiator Core Rose For Isuzu The oil radiator core with part number 5112890090, also identified as 511289-0090 or 5-11289009-0, is a component specifically designed for the Isuzu Ex100 4Bd1 engine. This product plays a crucial role in regulating the temperature of engine oil, ensuring optimal performance and efficiency in the Isuzu engine.