Continental 63251 Engine Coolant Bypass Hose

Continental Molded Engine Coolant Bypass Hose

Continental 63251 is a molded engine coolant bypass hose built for vehicles that route glycol-based coolant through the radiator circuit and related cooling-system components. With a 0.594 in. inside diameter at both ends and a 7.290 in. length, it provides the correct molded routing for direct replacement service on select applications.

The Continental Molded line focuses on OE-style hose construction for cooling-system service. This hose meets or exceeds SAE 20R4EC Class D1 radiator hose specifications, giving buyers a specification-based replacement for coolant transfer in demanding underhood environments.

Key Features

• Part number: 63251
• 0.594 in. inside diameter at both ends
• 7.290 in. overall length
• Molded hose shape for application-specific routing
• Built for glycol-based coolant flow in the cooling system
• Meets or exceeds SAE 20R4EC Class D1 radiator hose requirements

Vehicle Fitment

• Fits 2000-2009 Saab 9-5, Water Pump To Tee
• Fits 2000-2003 Saab 9-3, Water Pump To Tee
• Fits 1996-2000 Mercury Sable, N/A
• Fits 1996-1999 Ford Taurus, N/A
• Fits 1994-1998 Saab 900, N/A
• Fits 1993-1995 Mazda RX-7, Heater To Pipe-1
• Fits 1990-1991 Chevrolet Corvette, Throttle Body To Pipe
• Fits 1988-1989 Chevrolet Corvette, Throttle Body To Intake Manifold
• Fits 1985-1986 Chevrolet Corvette, Throttle Body To Intake Manifold
• Fits 1987 Chevrolet Corvette, Throttle Body
• Fits 1986-1987 Isuzu Pickup, N/A
• Fits 1986-1987 Isuzu Trooper, N/A
• Fits 1986 Chevrolet Camaro, Engine To Heater
• Fits 1986 Pontiac Firebird, Engine To Heater
• Fits 1984 Volkswagen Rabbit Convertible, Pipe To Pipe

What This Hose Helps Address

• Coolant leaks from a cracked, hardened, or swollen bypass hose
• Incorrect hose routing on molded cooling-system applications
• Restricted coolant transfer between the water pump, tee, heater, or throttle-body circuit
• Service issues on Saab 9-5, Saab 9-3, and Chevrolet Corvette cooling-system layouts
• Replacement needs for aging Ford Taurus, Mercury Sable, and Mazda RX-7 coolant hoses

Installation Notes and Tips

Verify the hose path, end diameters, and molded shape against the removed part before installation. Clean the tube and fitting surfaces, inspect clamps and adjoining pipes for corrosion or damage, and confirm the hose is seated fully before refilling and bleeding the cooling system. For fitment-specific searches, this part is commonly referenced for Saab 9-5 water pump to tee routing, Chevrolet Corvette throttle body routing, and Mazda RX-7 heater-to-pipe service.

Quality Assurance

Continental 63251 is manufactured to meet or exceed SAE 20R4EC Class D1 radiator hose specifications. The Continental Molded hose line is built for cooling-system replacement work where correct dimensions and molded routing matter. This part cross-references Dayco 87653 and Gates 18777 for the same application.