Gates 20121 Radiator Coolant Hose - Lower, Lower - Engine To Radiator or Upper

Gates 20121 Molded Coolant Hose Overview

The Gates 20121 molded coolant hose is an EPDM radiator coolant hose built to OEM-quality specifications for upper, lower, bypass, heater, and other coolant routing needs. Its molded shape helps match factory hose routing for service on vehicles such as the Jeep CJ5, Pontiac LeMans, and Chrysler Town & Country.

Gates Molded Coolant Hose products are built as direct replacement-style hoses for common cooling system service, with coverage across multiple hose applications in one product line. The 20121 part number is part of that molded hose family and is used where a formed hose profile is required for proper fitment.

Key Features

• EPDM construction for coolant system service
• Molded hose design for formed routing
• 1.5 in. inside diameter at both ends
• 17.9 in. centerline length
• No spring and no quick-connect fittings
• Compatible with upper, lower, bypass, and heater hose applications
• Gates part number 20121

Detailed Description

This Gates 20121 radiator coolant hose is a molded replacement hose with OEM-style dimensions and a formed profile that helps match the original routing path. The EPDM material is commonly used in cooling system service because it is suited for coolant exposure and under-hood temperatures. For fitment-specific searches, this hose is listed for 1972-1974 Jeep CJ5 upper radiator and HVAC compatible coolant and heater hose service, 1971-1972 Pontiac LeMans upper hose service for vehicles without air conditioning, and 1941-1942 Chrysler Town & Country lower hose service.

If you are searching for a molded coolant hose for Jeep CJ5, Pontiac LeMans, or Chrysler Town & Country applications, Gates 20121 provides a direct replacement-style option with the correct formed shape for those listed positions. This part cross-references Continental 60910 for the same application.

Common Problems This Hose Can Address

• Cracked or split radiator hose material
• Collapsed or softened coolant hose sections
• Incorrect hose routing from a straight universal hose
• Coolant leaks at the upper or lower hose location
• Fitment issues when replacing a formed factory hose

Installation Notes and Tips

• Verify the hose position before installation: upper, lower, bypass, or heater routing.
• Match the 1.5 in. end inside diameter and 17.9 in. centerline length to the original hose.
• Inspect hose clamps, necks, and adjoining cooling system components before reassembly.
• Confirm clearance around bends so the molded shape follows the factory path without twisting.
• Check coolant level and bleed air from the system after installation.

Quality Assurance

Gates molded coolant hoses are manufactured to OEM-quality specifications for replacement cooling system service. The Gates 20121 is part of the brand’s molded coolant hose line, which covers a broad range of formed hose applications for radiator and heater hose replacement.