Gates 21639 Radiator Coolant Hose - Lower

Gates 21639 Molded Coolant Hose Overview

The Gates 21639 molded coolant hose is a radiator coolant hose built to OE-style dimensions for lower cooling system routing. Made from EPDM, it provides the molded shape and end sizing needed for direct replacement service on select Dodge, Plymouth, and Pontiac applications.

Compatible With 1986-1990 Dodge Caravan, lower; 1986-1990 Plymouth Voyager, lower; 1987-1989 Dodge Grand Caravan, lower; and 1988 Plymouth Grand Voyager, lower. It also fits 1988 Pontiac Tempest, lower, with a note that it is not compatible with vehicles equipped with AC.

Key Features

• Gates Molded Coolant Hose line for radiator and cooling system service
• EPDM construction for coolant hose applications
• Molded design for lower hose routing
• End 1 inside diameter: 1.25 in. (32 mm)
• End 2 inside diameter: 1.5 in. (38 mm)
• Centerline length: 29.1 in. (739 mm)
• No spring, no modular hose sections, and no quick-connect fittings

Product Details

Gates molded coolant hoses are built for upper, lower, bypass, heater, and other coolant routing needs, with OEM-quality specifications that support accurate fitment during radiator hose replacement. The Gates 21639 follows that approach with a molded profile and application-specific dimensions for lower hose service on select minivan and compact car platforms. This part cross-references Dayco 71279 and FEL-PRO 61341 for the same application.

What It Helps Address

• Cracked or aged lower radiator hose
• Coolant leaks at the hose body or connection points
• Collapsed or misshaped hose routing
• Restricted coolant flow from deteriorated hose material
• Service delays when replacing a worn OE-style hose

Installation Notes

Verify the vehicle’s engine bay routing, end diameters, and centerline length before installation. Confirm the application note for the 1988 Pontiac Tempest, lower, since this hose is not for vehicles equipped with AC. Use proper coolant service procedures, inspect adjoining clamps and necks, and replace the hose only after the cooling system has cooled completely.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for replacement use in the cooling system. The Gates 21639 is part of the brand’s molded coolant hose line, which covers a broad range of radiator, heater, bypass, and other coolant applications.