1217230660 121723-0660 1-21723066-0 Zx330 6Hk1 Oil Radiator Core For Isuzu. This oil radiator core, part number 1217230660, is designed for Isuzu engines, specifically compatible with the ZX330 model equipped with the 6HK1 engine. It efficiently dissipates heat to maintain optimal operating temperatures, ensuring the engine remains cool and functions effectively.