Continental 64577 HVAC Heater Hose - Heater Outlet

Overview

Continental Molded HVAC heater hose Part Number 64577 is a molded coolant hose for heater circuit routing. It transfers glycol-based coolant through the heater core and related bypass paths, with construction that meets SAE 20R3EC Class D1 and D2 requirements.

Compatible With Ram 1500, Ram 1500 Classic, Ram 2500, Ram 3500, Ram 4000, and Dodge Ram truck applications listed below, this hose is shaped for heater outlet routing and uses an electrochemical degradation-resistant design for long-term coolant service.

Key Features

• Molded heater hose construction for formed coolant routing.
• Built to transfer glycol-based coolant through heater and bypass circuits.
• SAE 20R3EC Class D1 and D2 specification support.
• Resistant to electrochemical degradation for coolant-system durability.
• 0.620 in. inside diameter at both ends with a 46.400 in. hose length.

Product Details

Continental 64577 is a molded HVAC heater hose intended for coolant flow between the engine cooling system and heater core circuit. The formed shape helps match the routing used in Ram truck heater outlet applications, while the SAE-rated construction and ECR resistance address the demands of hot coolant exposure and long service intervals. This part cross-references Dayco 87972 and Gates 19569 for the same application.

Common Issues It Can Address

• Cracked or softened heater hose material.
• Coolant seepage at the heater hose routing.
• Restricted heater circuit flow from a deteriorated hose.
• Incorrect hose shape after prior repair or replacement.
• Service needs in molded coolant transfer lines.

Installation Notes

Verify hose routing, end diameter, and molded shape against the removed part before installation. Confirm the heater outlet application and inspect adjoining clamps, fittings, and coolant condition during service. Use the listed fitment data to match the correct Ram or Dodge Ram model and year range before ordering.

Quality Assurance

Continental identifies this hose with SAE 20R3EC Class D1 and D2 specification support and resistance to electrochemical degradation, reflecting a construction standard used for coolant-system service.