Continental 63505 HVAC Heater Hose - Heater To Water Pump or Reservoir To Tee

Continental HVAC Heater Hose 63505

Continental 63505 is a molded HVAC heater hose built to move glycol-based coolant between the heater core, radiator bypass circuit, and related cooling system components. With a 0.620 in. inside diameter at both ends and a 37.410 in. molded length, it is shaped for direct routing in supported applications.

For Chevrolet Blazer, GMC Jimmy, Chevrolet S10, and GMC Sonoma heater-to-water-pump routing, this Continental Molded hose follows the factory-style path for a cleaner fit. It also serves reservoir-to-tee applications on select Volkswagen Golf and Jetta models.

Key Features

• Continental Molded HVAC heater hose, part number 63505
• 0.620 in. inside diameter at both ends
• 37.410 in. molded length for routed cooling-system fitment
• Transfers glycol-based coolant to and from the heater core and bypass circuits
• Built to SAE 20R3EC Class D1 and Class D2 specifications
• Resistant to electrochemical degradation (ECR)

Product Details

This heater hose is designed for coolant transfer in the HVAC and engine cooling system, where molded routing helps maintain the correct path between components. Continental 63505 is specified for heater-to-water-pump applications on 1996-2005 Chevrolet Blazer, 1996-2005 GMC Jimmy, 1996-2004 Chevrolet S10, 1996-2004 GMC Sonoma, 1996-2001 Oldsmobile Bravada, and 2000 Isuzu Hombre. It also applies to reservoir-to-tee routing on 1999-2001 Volkswagen Golf and 2000 Volkswagen Jetta, with molded/cut-to-fit notes where listed.

This part cross-references Dayco 87739 for the same application.

Common Uses

• Heater hose leaks at the water pump connection
• Cracked or softened coolant hose routing in the HVAC circuit
• Restricted coolant flow to the heater core
• Bypass hose deterioration from heat and coolant exposure
• Incorrect hose shape after a previous repair

Installation Notes

Verify hose routing, end diameters, and molded shape before installation. Match the vehicle application and position exactly, especially on Chevrolet Blazer, GMC Jimmy, Chevrolet S10, and GMC Sonoma heater-to-water-pump layouts. On Volkswagen Golf and Jetta reservoir-to-tee applications, confirm whether the hose is used as cut-to-fit or molded per the vehicle note. Inspect clamps, fittings, and adjoining coolant components for wear before refilling the system.

Quality Assurance

Continental designs this hose to meet SAE 20R3EC Class D1 and Class D2 requirements and to resist electrochemical degradation, supporting durable coolant transfer in the specified applications.