Gates 21047 Radiator Coolant Hose - Lower

Gates 21047 Molded Coolant Hose

Gates 21047 is a molded radiator coolant hose built to OEM-quality specifications for lower cooling-system service. It uses EPDM construction and includes an internal spring to help maintain hose shape under heat and vacuum conditions.

This Molded Coolant Hose line is engineered for upper, lower, bypass, heater, and other coolant routing needs, giving you a direct replacement option for service work on classic Ford trucks. Compatible With 1968-1976 Ford F-100, F-150, F-250, and F-350 lower radiator hose applications, Gates 21047 supports accurate fitment where the original hose routing matters.

Key Features

• EPDM rubber construction for coolant-system durability
• Molded shape for proper routing and fit
• Internal spring included to help resist collapse
• 2 in. inside diameter at both ends
• 16.3 in. centerline length
• Direct replacement for lower radiator coolant hose service

Detailed Description

Gates 21047 is part of the Gates Molded Coolant Hose product line, a replacement hose range covering multiple coolant applications with OEM-style specifications. This part is shaped for lower radiator use and is listed for 1968-1970 Ford F-100, F-250, and F-350 models without a 4-inch thick radiator, as well as 1971-1976 Ford F-100, F-250, and F-350 and 1975-1976 Ford F-150 models with the specified radiator thickness notes. If you are replacing a worn lower hose on a Ford F-100 or Ford F-350, Gates 21047 provides the molded routing and dimensions needed for a proper service replacement.

This part cross-references Dayco 70683 and Continental 60997 for the same application.

What It Helps Fix

• Coolant leaks from cracked or aged lower radiator hoses
• Softening, swelling, or hose deformation from heat exposure
• Restricted coolant flow caused by a collapsing hose
• Poor hose routing after a previous incorrect replacement
• Service delays when sourcing an OE-style molded hose

Installation Notes and Tips

Verify radiator thickness notes before ordering: 1968-1970 Ford F-100, F-250, and F-350 applications are listed for vehicles without a 4-inch thick radiator, while 1971-1976 Ford F-100, F-250, and F-350 and 1975-1976 Ford F-150 applications are listed with 2 3/8-inch and 2 3/4-inch thick radiator top notes. Inspect hose clamps, coolant condition, and mating surfaces before installation, and confirm the hose follows the original routing without twist or tension.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications and backs it with the brand’s established replacement-hose engineering standards.