Continental 63299 Engine Coolant Bypass Hose

Continental 63299 Engine Coolant Bypass Hose

Continental 63299 is a molded engine coolant bypass hose built for glycol-based coolant routing in the heater core, radiator bypass, and related engine cooling circuits. It is sized with a 1.063 in. inside diameter at both ends and an 11.000 in. hose length for direct replacement applications.

Key Features

• Molded coolant bypass hose for engine cooling system routing
• 1.063 in. inside diameter at hose end 1 and end 2
• 11.000 in. overall hose length
• Built to meet SAE 20R3EC Class D1 and Class D2 specifications
• Resistant to electrochemical degradation (ECR)
• Continental Molded product line for formed hose applications

Product Details

This Continental Molded hose is engineered for vehicles that use a formed bypass hose to move coolant between the engine, heater core, and radiator bypass passages. The molded shape helps match the original routing path, while the SAE 20R3EC Class D1 and D2 construction supports use in modern coolant systems. Continental 63299 is a direct-fit style replacement for select Nissan Maxima, Nissan Quest, and Mercury Villager applications, including 1985-1994 Nissan Maxima and 1993-2002 Nissan Quest and Mercury Villager models.

This part cross-references Gates 22063 for the same application.

What It Helps Address

• Coolant seepage from a cracked or aged bypass hose
• Softening, swelling, or collapse in the coolant hose path
• Restricted coolant flow through heater core bypass routing
• Heat-related hose deterioration in the engine bay
• Electrochemical wear that can shorten hose service life

Installation Notes and Tips

Verify hose routing, end diameters, and molded shape against the original part before installation. Confirm fitment for your specific Nissan Maxima, Nissan Quest, or Mercury Villager year and engine configuration, and inspect adjoining clamps, fittings, and coolant passages for wear or corrosion before reassembly. After installation, refill and bleed the cooling system according to the vehicle service procedure.

Quality Assurance

Continental manufactures this hose to SAE 20R3EC Class D1 and D2 specifications and includes resistance to electrochemical degradation for added durability in coolant service.