Continental 63348 Engine Coolant Bypass Hose

Continental 63348 Engine Coolant Bypass Hose

Continental 63348 is a molded engine coolant bypass hose built for glycol-based cooling systems. It transfers coolant between the heater core, radiator bypass circuit, and related engine components while maintaining the formed routing needed for a clean OE-style fit.

With a 0.560 in. inside diameter at both ends and a 7.130 in. hose length, this molded hose is sized for specific cooling-system connections across a wide range of vehicles, including Subaru WRX, Subaru WRX STI, and Chevrolet Silverado 1500 applications.

Key Features

• Molded coolant bypass hose for formed routing in engine cooling systems
• 0.560 in. inside diameter at Hose 1 and End 2
• 7.130 in. hose length for specified bypass and heater-core connections
• Built for glycol-base coolant transfer to and from the heater core and radiator bypass circuit
• Meets SAE 20R3EC Class D1 and D2 specifications
• Resistant to electrochemical degradation (ECR)
• Continental Molded line for application-specific hose routing

Product Details

Continental Molded part number 63348 is engineered for cooling-system service where a formed hose is required to maintain the correct path between engine, heater, thermostat, tee, or pipe connections. The molded shape helps match the original routing on vehicles such as 2013-2017 Subaru WRX heater outlet applications, 2013-2017 Subaru WRX STI heater outlet applications, and 1999-2005 Chevrolet Silverado 1500 cut-to-fit or molded configurations. This part cross-references Dayco 71877 and Gates 18454 for the same application.

As a molded coolant bypass hose, it supports coolant circulation through heater and bypass circuits on a broad range of domestic and import vehicles. The Continental 63348 part number is also listed across multiple interchange references, making it a practical replacement choice when matching an OE-style formed hose is required.

Common Problems This Hose Can Address

• Coolant leakage from a cracked, swollen, or deteriorated bypass hose
• Incorrect hose routing after cooling-system repair
• Loss of heater-core coolant flow due to hose failure
• Bypass circuit restriction caused by aged rubber hose
• Fitment issues when a straight universal hose will not follow the original path

Installation Notes and Tips

Verify hose routing, inside diameter, and connection points before installation. This hose is listed across multiple positions, including heater outlet, pipe-to-thermostat, engine-to-pipe, and heater-to-tee applications, so confirm the exact vehicle configuration before ordering. On some applications, the listing notes molded or cut-to-fit usage; follow the vehicle-specific routing and inspect adjoining clamps, pipes, and fittings for wear before reassembly.

Quality Assurance

Continental specifies this hose to SAE 20R3EC Class D1 and D2 requirements and notes resistance to electrochemical degradation (ECR), supporting durability in coolant service. The Continental Molded line is built for application-specific cooling-system routing and consistent replacement fitment.