Dayco 77100GL Engine Coolant Reservoir Hose

Heavy-Duty Straight Radiator Hose

Dayco 77100GL is a straight radiator hose built for heavy-duty cooling system service. It is listed for a wide range of Peterbilt and International applications, along with select Ford truck fitments, including reservoir-to-radiator and filler tank connections.

Key Features

• Straight hose design for direct coolant routing in heavy-duty systems
• Fits multiple truck cooling system locations, including reservoir-to-radiator and filler tank applications
• Cut-to-fit notes are listed for several International applications
• Dayco 77100GL is cross-referenced to common aftermarket part numbers for the same application
• Compatible with select Peterbilt 365, Peterbilt 377, Peterbilt 375, International 5070, and Ford B-600 applications

Detailed Description

This Dayco hose is intended for heavy-duty cooling system service where a straight hose layout is required. Fitment includes 2015-2018 Peterbilt 365, 1996-1999 Peterbilt 377, 1995-1996 Peterbilt 375, and multiple International medium- and heavy-duty truck applications such as 5070, 8100, 8200, 8300, and F5070 variants. It also lists Ford B-600, B-700, and CL9000 coverage. The 77100GL part number appears across several interchange references, including Gates 24216 and CARQUEST 24216, which helps confirm application matching during lookup.

Brand Line: Straight Radiator Hose - H.D. identifies this as a heavy-duty hose line for cooling system routing rather than a general-purpose hose. Use the listed position and notes to verify whether your application calls for a lower, heater, radiator side, outlet, filler tank, or reservoir-to-radiator connection. Dayco 77100GL is a practical replacement choice when the original hose path is straight and the vehicle-specific fitment matches.

What It Is Used For

• Replacing a worn or cracked coolant hose in heavy-duty truck cooling systems
• Restoring coolant flow between the reservoir and radiator
• Addressing leaks at filler tank, heater, outlet, or radiator-side hose connections
• Replacing a hose that no longer matches the original routing or length requirements
• Supporting service on older Peterbilt, International, and Ford truck applications

Installation Notes and Tips

Verify the vehicle year, make, model, and listed position before ordering. Several International applications are marked cut to fit, so confirm hose length and routing against the original part before installation. Match the connection style and cooling system location exactly, especially on applications listed as reservoir to radiator, filler tank, lower, heater, radiator side, or outlet. Dayco 77100GL should be compared against the removed hose and the vehicle’s cooling system layout for proper fitment.

Quality Assurance

Dayco is a recognized supplier of cooling system components, and this hose is cataloged with multiple interchange references for application verification. Part number 77100GL can be matched against cross-references such as Gates 24216 and CARQUEST 24216 for the same application.