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Gates molded upper coolant hose for 1990–1999 Mack RD Series with the Mack 6‑cylinder 12.0L diesel engine. This upper molded hose replaces the factory top coolant connection, maintaining correct coolant routing between engine and radiator for the RD series. It is used during cooling system maintenance whenever the OEM upper hose is worn, cracked, or leaking to restore dependable coolant circulation.
Gates 90-99 Mack RD Series Mack 6-Cyl. 12.0L Diesel Upper Molded Coolant Hose
