Thomas Radiator - Northern Radiator 238621, Active Radiator Supply Company 3100-83, 1-800-Radiator 2400249, Reach Cooling 42-10452

When your Thomas Saf-T-Liner needs a new radiator, Reach Cooling 42-10452 is the aftermarket direct replacement built to OE specifications. This unit cross-references Northern Radiator 238621, Active Radiator Supply Company 310083, 1-800-Radiator 2400249, Serck FLA001033, NAPA NR4210452, and OSC HD1049, making it straightforward to confirm you have the right part for your application. It fits Thomas Saf-T-Liner buses equipped with the 4.3L engine from 2007 to 2011, the 7.2L from 2007 to 2008, the 8.9L from 2009 to 2016, and the 6.7L in 2016. The aluminum core features reinforced B-type tubes with central support to resist pressure and reduce tube failures, while deep extrusion headers create a stronger tube-to-header joint that stands up to vibration and thermal cycling without leaking. Folded fin edges improve stability and heat disbursement, and thermal expansion cuts allow the core to expand and contract naturally through normal heat cycles for extended service life. At 27.56 inches tall by 31.81 inches wide with a 1.78-inch core depth, this cross-flow radiator positions the inlet at the top left and outlet at the bottom right, matching the original layout exactly. If you are sourcing by any of the interchanges above, this is the correct replacement for Thomas Saf-T-Liner cooling systems.