1217230470 121723-0470 1-21723047-0 Zx450 6Wg1T Oil Radiator Core For Isuzu The oil radiator core with part number 1217230470, also known as 121723-0470 or 1-21723047-0, is designed for the Isuzu Zx450 6Wg1T engine. This product functions to assist in cooling the engine oil, ensuring that the Isuzu engine operates within the appropriate temperature range.