Continental 63159 Engine Coolant Bypass Hose

Continental 63159 Engine Coolant Bypass Hose

Continental 63159 is a molded engine coolant bypass hose built for coolant routing between the heater core, bypass circuits, radiator, and related engine components. With a 5/8 in. inside diameter and a 17.720 in. molded length, it is sized for direct replacement applications where accurate hose routing matters.

Compatible With select Honda CR-V, Acura CL, Lincoln LS, and other listed vehicles, this hose is made to handle glycol-based coolant flow and meet SAE 20R3EC Class D1 and D2 requirements. The Continental Molded line focuses on formed hose routing for applications that require a specific shape rather than a universal straight hose.

Key Features

• Part number: 63159
• 5/8 in. inside diameter at both ends
• 17.720 in. molded hose length
• Transfers glycol-based coolant through heater and bypass circuits
• Built to SAE 20R3EC Class D1 and D2 specifications
• Resistant to electrochemical degradation (ECR)
• Continental Molded hose construction for formed routing

Application Details

This hose is used in coolant and heater plumbing where a molded bypass path is required. It is listed for 2002-2006 Honda CR-V, N/A; 2000-2006 Lincoln LS, Heater To Heater Pipe (Center); 1998-1999 Acura CL, Heater To Valve; and additional Buick, Chevrolet, Ford, Mercury, Oldsmobile, Pontiac, and Toyota applications. Part number 63159 also cross-references Gates 18827 for the same application.

What It Helps Address

• Coolant leaks from a cracked or aged bypass hose
• Restricted heater flow caused by hose collapse or internal wear
• Incorrect hose routing after cooling system service
• Loss of heater performance from damaged coolant transfer lines
• Electrochemical hose degradation in demanding cooling systems

Installation Notes and Tips

• Verify hose diameter, molded shape, and routing before installation.
• Match the vehicle position and notes exactly, especially on cut-to-fit listings.
• Inspect adjoining heater pipes, valves, and clamps for wear before reassembly.
• Drain coolant safely and refill the system according to the vehicle service procedure.
• Confirm there are no kinks or twist points after the hose is installed.

Quality Assurance

Continental Molded hoses are produced to meet defined SAE coolant hose specifications and include resistance to electrochemical degradation for added durability in coolant service. Part number 63159 is built for direct-fit use in the listed applications, including Honda CR-V and Acura CL cooling system routing.