Gates 18718 HVAC Heater Hose - Heater To Engine, Heater To Outlet or Heater To Pipe

Gates 18718 Molded Heater Hose Overview

The Gates 18718 molded heater hose is an OEM-style coolant hose built for tight engine bays where a formed routing path matters. It is made from EPDM and measures 17.3 inches centerline length with 16 mm inside diameter at both ends, making it a direct-style solution for heater, coolant, water, and air routing.

Compatible With select Hyundai Tiburon, Hyundai Elantra, Cadillac CTS, Nissan Sentra, Nissan Pulsar NX, and Mazda 626 applications, this Gates Molded Heater Hose line is shaped to follow factory hose paths in smaller engine compartments. The 18718 part number is also approved for marine applications.

Key Features

• Gates Molded Heater Hose, part number 18718
• Factory-molded, OEM-style hose profile
• EPDM construction for coolant, water, and air service
• 16 mm inside diameter at both ends
• 17.3 in. centerline length for formed routing
• Approved for marine applications
• Cross-reference: Continental 63333

Detailed Product Description

Gates 18718 is a molded HVAC heater hose designed for vehicles that use a shaped coolant hose to connect the heater circuit to the engine, outlet, or pipe. The formed design helps match factory routing in compact engine compartments, reducing the need to force a straight hose into a curved path. This makes the hose a practical replacement for applications such as 2003-2008 Hyundai Tiburon heater to engine, 2003-2006 Hyundai Elantra heater to engine, and 2003-2004 Cadillac CTS heater to engine.

The Gates Molded Heater Hose product line focuses on OE-style fit and routing, and this hose follows that approach with a molded shape, EPDM material, and matched end diameters. The 18718 part number is also listed for 2001 Hyundai Elantra heater to outlet, 1989-1990 Nissan Sentra heater to engine, 1989-1990 Nissan Pulsar NX heater to engine, and 1986-1987 Mazda 626 heater to pipe applications.

What This Hose Helps Solve

• Coolant leaks from a cracked or aged heater hose
• Improper hose routing in tight engine compartments
• Loss of heater circuit flow caused by hose deterioration
• Replacement needs for molded heater hose applications
• Service issues on Hyundai Elantra, Hyundai Tiburon, and Cadillac CTS heater connections

Installation Notes and Tips

Verify the hose path, end diameters, and centerline length before installation. This molded hose is intended for applications that require a formed shape, so compare the original hose routing to the replacement part before connecting it. Confirm the vehicle’s heater-to-engine, heater-to-outlet, or heater-to-pipe configuration to match the listed fitment for the 18718 part number.

Quality Assurance

Gates is known for OE-style fluid transfer components, and this molded heater hose is built to factory-style dimensions for listed applications. The hose material, molded construction, and application-specific shape support consistent replacement performance in the vehicles shown above.