Industrial 12339163 4720-01-196-1636 Radiator Hose

The USGI 12339163 Radiator Hose is a molded rubber coolant hose designed to transfer coolant between the surge tank and the lower radiator tube in M998 Humvees, ensuring steady engine temperature regulation in GM 6.2L diesel and early GM 6.5L diesel configurations. It serves as a critical component of the engine coolant circulation system, installed at the lower radiator to surge tank connection and compatible with round surge tanks configured for a 3-speed setup. This part is cataloged as NSN 4720-01-196-1636 with alternate part number 5591456, making it a standard replacement in maintenance and refurbishment of aging cooling assemblies on HMMWV platforms. Commonly used by maintenance personnel, military fleet operators, and restoration specialists, the radiator hose supports reliable coolant flow and helps sustain engine performance under demanding operating conditions. It is associated with FSC 4720 – Hose and Flexible Tubing for engine cooling system applications.