Gates 19811 HVAC Heater Hose - Heater To Pipe-1

Gates 19811 Molded Heater Hose Overview

Gates 19811 is a molded HVAC heater hose built for tight engine bays where a factory-shaped coolant hose is needed. It uses EPDM construction and a small 3/4 in. inside diameter at both ends to support coolant, water, and air routing in the heating and cooling system.

This molded heater hose is shaped to match the routing used on 2000-2002 Chevrolet Cavalier and 2000-2002 Pontiac Sunfire applications at the heater to pipe-1 position. The Gates Molded Heater Hose line focuses on OEM-style fitment for compact engine compartments, and this part number 19811 follows that approach for direct replacement service.

Key Features

• Gates part number 19811
• OEM-style molded hose profile for tighter engine compartments
• EPDM material for coolant system service
• 3/4 in. inside diameter at both ends
• 18.2 in. centerline length
• Approved for coolant, water, air, and marine applications
• Fits heater to pipe-1 routing on select Chevrolet Cavalier and Pontiac Sunfire models

Detailed Product Description

Gates 19811 is a factory-molded heater hose designed to follow the original routing used in select compact vehicles. The molded shape helps maintain proper hose alignment in crowded engine compartments, while the EPDM construction supports use in heating and cooling circuits. For buyers searching for a 2000-2002 Chevrolet Cavalier heater hose or a 2000-2002 Pontiac Sunfire molded heater hose, this part number 19811 matches the listed heater to pipe-1 application.

This Gates Molded Heater Hose line is built for OEM-style replacement where a straight hose would not match the original path. The 18.2 in. centerline length and 19 mm end inside diameter on both ends make it a direct-spec option for the confirmed fitment listed below. This part cross-references Four Seasons 64103 for the same application.

Common Problems This Hose Can Address

• Coolant leakage from a cracked or aged heater hose
• Improper hose routing in a tight engine compartment
• Softening, swelling, or deterioration of the original EPDM hose
• Restricted heater circuit flow caused by a damaged hose section
• Replacement needs for heater to pipe-1 hose routing on Cavalier and Sunfire models

Installation Notes and Tips

Verify the hose routing, end diameters, and centerline length before installation. Compare the original hose shape to Gates 19811 to confirm the molded bends match the vehicle’s heater to pipe-1 path. Inspect adjoining pipes, clamps, and coolant connections for wear or corrosion before reassembly, and refill the cooling system with the correct coolant after service.

Quality Assurance

Gates is known for OE-style hose engineering, and this molded heater hose is built to factory-style dimensions for the listed applications. The EPDM construction and molded profile support consistent fitment in the confirmed Chevrolet Cavalier and Pontiac Sunfire applications.