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The Gates upper flexible heavy-duty coolant hose is a replacement upper radiator line for Mack RW Series trucks with Cummins 6-cylinder 14.0L diesel engines produced 1985–1991. Designed to restore coolant circulation between engine and radiator or related components, it matches factory upper routing for heavy-duty applications. Specify this hose when maintaining RW Series trucks that require the correct upper coolant connection.
Gates 85-91 Mack RW Series Cummins 6-Cyl. 14.0L Diesel Upper Flexible HD Coolant Hose
