Gates 18889 HVAC Heater Hose - Heater To Engine or Pump To Chiller

Gates Molded Heater Hose 18889 Overview

Gates 18889 is a factory-molded HVAC heater hose built for tight engine compartments and OE-style routing. Made from EPDM, it is shaped for a precise coolant path and is also approved for coolant, water, air, and marine applications.

This molded heater hose is a direct-fit style solution for select Tesla X pump-to-chiller routing and older Buick Skylark, Oldsmobile Achieva, Pontiac Grand Am heater-to-engine applications. Gates Molded Heater Hose 18889 is built to match the compact bends needed in modern and legacy cooling systems.

Key Features

• Factory-molded, OE-style hose for accurate routing
• EPDM construction for coolant system service
• Small inside diameter: 0.62 in. / 16 mm at both ends
• Centerline length: 22.9 in. / 582 mm
• Compatible with coolant, water, air, and marine use
• Fits tight engine bay layouts where straight hose is not practical

Product Details

Gates Molded Heater Hose 18889 is part of the Gates Molded Heater Hose line, which focuses on pre-formed coolant hose routing for vehicles with limited clearance. The molded shape helps maintain the intended hose path between components, reducing the need for improvised bends in HVAC and cooling circuits. This part number is commonly referenced as Gates 18889 and cross-references Dayco 87709 for the same application.

Compatible With 2016-2021 Tesla X, Pump To Chiller; 1993 Buick Skylark, Heater To Engine; 1993 Oldsmobile Achieva, Heater To Engine; 1992-1993 Pontiac Grand Am, Heater To Engine; 1988-1992 Buick Skylark, Heater To Engine; 1992 Oldsmobile Achieva, Heater To Engine; 1988-1991 Oldsmobile Cutlass Calais, Heater To Engine; 1988-1991 Pontiac Grand Am, Heater To Engine.

Common Uses

• Replacing a cracked or leaking molded heater hose
• Restoring coolant flow between the heater circuit and engine
• Repairing a damaged pump-to-chiller hose on Tesla X applications
• Correcting hose routing in compact engine compartments
• Addressing hose deterioration from heat and age

Installation Notes

Verify end diameters, centerline length, and molded shape before installation. On listed Buick, Oldsmobile, and Pontiac applications, check routing clearance and note that some fitments require a protective sleeve. Confirm the hose path matches the original layout before filling and bleeding the cooling system.

Quality Assurance

Gates is known for OE-style hose construction and application-specific molded routing. Part number 18889 is built to the listed dimensions and fitment references for accurate replacement selection.