Gates 18786 HVAC Heater Hose

Gates Molded Heater Hose 18786 Overview

Gates 18786 is a factory-molded heater hose built for tight engine bays where a straight hose will not route cleanly. Made from EPDM and formed to OEM-style dimensions, it serves coolant, water, and air transfer needs and is also approved for marine applications.

This molded heater hose is a direct-fit style solution for select Chevrolet Impala, Chevrolet Monte Carlo, Ford Econoline vans, Mitsubishi Diamante, Kia Sephia, Chevrolet Chevette, and Pontiac Acadian applications. The Gates Molded Heater Hose line focuses on shaped routing for smaller, tighter-fitting engine compartments.

Key Features

• Gates Molded Heater Hose, part number 18786
• Factory-molded, OEM-style shape for precise routing
• EPDM construction for heater and coolant service
• Small I.D. design with 0.62 in. / 16 mm ends
• 17.7 in. centerline length for formed hose routing
• Approved for coolant, water, air, and marine applications
• Compatible with select GM, Ford, Mitsubishi, and Kia vehicles

Detailed Description

Gates 18786 is a molded heater hose engineered to follow the original hose path in compact engine compartments. Its formed profile helps maintain proper routing around nearby components, while the EPDM material is suited for heater circuit service and other fluid or air transfer applications. For buyers searching for a molded heater hose for a 2006-2011 Chevrolet Impala Pipe-4 To Heater or a 2006-2007 Chevrolet Monte Carlo Pipe-4 To Heater, this part number provides an OE-style replacement option. It also cross-references Four Seasons 63300 and CSF 10786 for the same application.

Common Uses

• Replacing a cracked or leaking heater hose
• Restoring heater circuit flow in a molded hose application
• Correcting routing issues in tight engine compartments
• Addressing coolant seepage at formed hose bends
• Replacing a hose that no longer holds its original shape

Installation Notes and Tips

• Verify end inside diameter, centerline length, and molded shape before installation.
• Match the vehicle position and notes exactly, especially on Ford E-150, E-250, and E-350 Econoline applications with auxiliary heater or A/C notes.
• Inspect adjoining pipes, tees, and thermostat connections for wear before installing the new hose.
• Confirm routing clears nearby components in smaller engine compartments.
• Use the vehicle-specific fitment listing for the exact year, make, model, and position.

Quality Assurance

Gates is known for OE-style hose construction and application-specific molded routing. Part number 18786 is built to match the listed fitment and dimensional requirements for the vehicles shown.