Gates 18971 HVAC Heater Hose

Gates 18971 Molded Heater Hose Overview

Gates 18971 is a factory-molded, OEM-style heater hose built for tight engine bays and small-diameter coolant routing. Made from EPDM, it is formed for direct routing in applications that need a precise bend profile for coolant, water, or air transfer.

Compatible With Chevrolet Impala, Malibu, Monte Carlo, Pontiac G6, Saturn Aura, and Toyota Pickup applications listed below, this molded heater hose supports radiator and HVAC coolant routing where a formed hose shape is required.

Key Features

• EPDM construction for coolant, water, and air service
• Factory-molded shape for tighter engine compartment routing
• Small inside diameter: 0.62 in. (16 mm) at both ends
• Centerline length: 11.5 in. (292 mm)
• OEM-style molded design for direct replacement use
• Approved for marine applications

Detailed Product Description

The Gates Molded Heater Hose line is built around formed hose routing for modern and older vehicles where straight hose stock will not follow the original path cleanly. Part number 18971 uses an EPDM hose body with matching 0.62-inch end diameters and an 11.5-inch centerline length to maintain the intended coolant path. This makes it a practical choice for heater hose and coolant hose service on vehicles such as the Chevrolet Impala and Chevrolet Malibu, where compact routing around the engine and water pump is important.

This Gates 18971 hose is also listed for Pontiac G6, Saturn Aura, Chevrolet Monte Carlo, and Toyota Pickup fitments with radiator or HVAC coolant routing notes. Cross-reference part numbers include 10971 and 14144S for the same application.

Common Problems This Hose Can Address

• Cracked or leaking molded heater hose sections
• Collapsed or softened coolant hose routing
• Improper hose fit in tight engine compartments
• Restricted coolant flow from a damaged formed hose
• Replacement needs for radiator and HVAC coolant hose routing

Installation Notes and Tips

Verify the hose path, end diameters, and centerline length before installation. Compare the original routing on the vehicle to the molded shape of Gates 18971 to confirm alignment with the pipe-to-engine, pipe-to-water-pump, or pipe-to-radiator position listed for your application. Inspect adjoining clamps, pipes, and fittings for wear or corrosion before installing the new hose.

Quality Assurance

Gates is known for producing molded coolant hose components that follow OEM-style routing requirements. Part number 18971 is built to match the dimensional and material needs of the listed applications, including Chevrolet Impala, Malibu, Monte Carlo, Pontiac G6, Saturn Aura, and Toyota Pickup fitments.