Gates 20677 Radiator Coolant Hose - Lower

Gates 20677 Molded Coolant Hose

The Gates 20677 molded coolant hose is built for radiator coolant hose replacement on select Pontiac Grand Prix and Chevrolet Monte Carlo applications. It follows OEM-quality specifications and is shaped for lower hose routing where a formed hose is required.

Key Features

• EPDM construction for coolant system service
• Molded design for a precise routing profile
• End inside diameters: 1.5 in. (38 mm) and 1.75 in. (44 mm)
• Centerline length: 25.1 in. (638 mm)
• No spring and no quick-connect fittings
• Gates Molded Coolant Hose line for upper, lower, bypass, heater, and other coolant applications

Product Details

Gates Molded Coolant Hose 20677 is a radiator coolant hose made to match formed hose applications where straight hose will not route correctly. The EPDM material is suited for coolant service, and the molded shape helps maintain the proper path between connection points. This part is used in lower hose positions on select vehicles, including 1968-1977 Pontiac Grand Prix and 1970-1972 Chevrolet Monte Carlo applications. It also cross-references Four Seasons 20677 for the same application.

Common Problems This Hose Can Address

• Cracked or split lower radiator hose
• Coolant leaks at a worn molded hose section
• Improper hose routing after a previous repair
• Softening or swelling from age and heat exposure
• Restricted coolant flow caused by hose deterioration

Installation Notes and Tips

Verify the hose shape, end diameters, and centerline length against the original part before installation. This Gates 20677 hose is listed for lower position use on 1968-1977 Pontiac Grand Prix and 1970-1972 Chevrolet Monte Carlo models, with notes that include radiator and HVAC compatible coolant and heater hose applications on some listings. Confirm vehicle equipment details such as air conditioning where noted in the fitment data. Inspect clamps, necks, and adjoining coolant components before refilling the system.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for replacement use in radiator and heater hose applications. The Gates molded coolant hose line is offered as a broad replacement range for formed coolant routing needs.