Continental 64604 HVAC Heater Hose - Heater Inlet

Continental 64604 Heater Hose for Ram

Continental 64604 is a molded HVAC heater hose built for coolant transfer between the heater core, radiator bypass circuit, and related engine cooling components. It is sized with a 0.625 in. inside diameter at both ends and a 47.688 in. molded length for direct routing on supported Ram applications.

Key Features

• Molded Continental heater hose for HVAC coolant routing
• 0.625 in. inside diameter at hose end 1 and end 2
• 47.688 in. molded length for application-specific fitment
• Built to move glycol-based coolant to and from the heater core
• Meets SAE 20R3EC Class D1 and Class D2 specifications
• Resistant to electrochemical degradation (ECR)

Product Details

This Continental Molded hose, part number 64604, is engineered for heater inlet service on Ram trucks with the correct molded routing. It is used in HVAC and engine cooling systems where a formed hose is needed to carry glycol-based coolant through the heater circuit and bypass paths. The molded shape helps match the factory-style hose path on 2011-2022 Ram 1500, 2019-2022 Ram 1500 Classic, 2011-2012 Ram 2500, and 2011-2012 Ram 3500 heater inlet applications. This part cross-references Gates 19570 for the same application.

What It Helps Address

• Coolant leakage at a worn or cracked heater hose
• Restricted heater core coolant flow
• Improper hose routing from a collapsed or misshaped hose
• Cooling system service needs on Ram 1500 and Ram 1500 Classic trucks
• Heater inlet hose replacement on Ram 2500 and Ram 3500 models

Installation Notes and Tips

Verify hose routing, diameter, and molded shape against the original part before installation. Confirm the heater inlet connection points are clean and free of debris, and inspect adjoining clamps, fittings, and nearby cooling system components for wear or damage. For best results, match the hose to the listed Ram year, model, and heater inlet position before service.

Quality Assurance

Continental designs this molded heater hose to SAE 20R3EC Class D1 and Class D2 requirements and to resist electrochemical degradation, which is important in modern coolant systems. Part number 64604 is built for consistent coolant transfer in the specified Ram heater inlet applications.