Western Star Radiator - Western Star A0522952004, Northern Radiator 238672, Spectra Premium 20014701, Reach Cooling 42-10372

If you need a replacement radiator for your Western Star, the Reach Cooling 42-10372 is the aftermarket solution built to restore your cooling system to full working order. This unit directly replaces Western Star 1A19377 and cross-references Northern Radiator 238672, Active Radiator Supply Company 800013, Spectra Premium 20014701, 1-800-Radiator 2400606, and Serck FLX001502, making it straightforward to verify you are ordering the correct part. The aluminum core and plastic tank are engineered to meet or exceed the original equipment specifications that Western Star set for these trucks. Reach Cooling's B-type tubes feature central reinforcement for improved pressure tolerance, while deep extrusion headers create a stronger tube-to-header joint that resists vibration and thermal fatigue, virtually eliminating header leaks. Thermal expansion cuts allow the core to breathe through normal heat cycles, and folded fin edges improve stability and heat disbursement. This radiator fits the Western Star 4900, 4900E, 4900EX, 4900FA, 4900SA, 5900, and 6900XD across model years 2000 through 2007 and covers a wide range of engine displacements. Whether you are sourcing by the OEM number 1A19377 or cross-referencing from another supplier, this is the direct replacement that fits and performs as the original did.