Gates 18973 HVAC Heater Hose - Heater To Water Pump

Gates Molded Heater Hose for Nissan 720

The Gates 18973 molded heater hose is an OEM-style coolant hose built for tight engine bays where a straight hose will not route correctly. It is formed to match the factory path for 1983-1985 Nissan 720 heater to water pump routing and is made from EPDM for coolant, water, and air service.

Gates Molded Heater Hose products are shaped for accurate routing in compact engine compartments. This line focuses on factory-style fitment and dependable hose geometry, making it a practical choice when replacing a worn or collapsed heater hose on a Nissan 720.

Key Features

• Part number: 18973
• OEM-style molded hose for factory routing
• EPDM construction for coolant, water, and air applications
• Small I.D. design for tighter engine compartments
• End I.D.: 0.62 in. (16 mm) at both ends
• Centerline length: 17.2 in. (437 mm)
• Molded profile for heater-to-water-pump routing
• Approved for marine applications

Detailed Description

Gates 18973 is a molded HVAC heater hose designed for 1983-1985 Nissan 720 models at the heater to water pump position. The factory-shaped profile helps maintain the correct hose path in confined engine spaces, while the EPDM material is suited for coolant transfer and related fluid or air service. If you are replacing a deteriorated hose on a Nissan 720, this molded replacement follows the original routing more closely than a universal straight hose. This part cross-references 10973 and 16115M for the same application.

What It Helps Address

• Coolant leaks from a cracked or aged heater hose
• Poor hose routing in a tight engine compartment
• Collapsed or softened hose sections from heat exposure
• Incorrect fitment when a straight hose cannot follow the factory path
• Service replacement for heater-to-water-pump routing on a Nissan 720

Installation Notes and Tips

Verify the hose path, end diameters, and centerline length before installation. Confirm the vehicle is a 1983-1985 Nissan 720 with heater to water pump routing, and inspect adjoining fittings for corrosion or scale that could affect sealing. Use proper coolant service procedures and check for leaks after the system is refilled and brought to operating temperature.

Quality Assurance

Gates manufactures molded coolant hoses to OE-style dimensions and routing standards for service replacement applications. Part number 18973 is built for the specified Nissan 720 fitment and uses EPDM construction for demanding underhood conditions.