Gates 19770 HVAC Heater Hose

Gates Molded Heater Hose 19770 Overview

The Gates 19770 molded heater hose is an OEM-style coolant hose built for tight engine compartments where a straight hose will not route correctly. With a 19 mm (0.73 in) inside diameter at both ends and a 262 mm (10.3 in) centerline length, it is made for direct heater outlet and coolant routing service on select INFINITI and Nissan applications.

Gates Molded Heater Hose line products are factory-shaped to follow the original hose path, helping maintain proper routing in compact HVAC and cooling layouts. This molded EPDM hose is approved for coolant, water, air, and marine applications.

Key Features

• Part number: 19770
• OEM-style molded heater hose for tight engine bay routing
• EPDM construction for coolant, water, and air service
• 19 mm (0.73 in) inside diameter at both ends
• 262 mm (10.3 in) centerline length
• Molded design for heater outlet and related HVAC coolant paths
• Approved for marine applications

Detailed Description

This Gates 19770 heater hose is built for vehicles that require a formed hose to connect the heater circuit without kinks or routing stress. It is listed for 2014-2017 INFINITI Q70 heater outlet, 2015-2017 INFINITI Q70L heater outlet, 2014 INFINITI QX70 heater outlet, 2013 INFINITI FX50 heater outlet, 2012-2013 INFINITI M56 heater outlet, 2009-2012 INFINITI FX50 tee to heater, 2011 INFINITI M56 heater to valve, 2001-2004 Nissan Pathfinder pipe-3 to pipe-4, and 2001-2003 INFINITI QX4 pipe-3 to pipe-4. If you are replacing a molded heater hose on an INFINITI Q70, INFINITI FX50, or Nissan Pathfinder, this part number 19770 matches the original-style formed routing needed for the application.

This part cross-references Dixie Electric Ltd 11770 for the same application.

Common Problems This Hose Can Address

• Cracked or hardened heater hose material
• Coolant seepage at a molded hose section
• Poor hose routing in a tight engine compartment
• Collapsed or kinked straight hose replacements
• Incorrect fitment on heater outlet or heater valve routing

Installation Notes and Tips

Verify the hose path, end diameters, and molded shape against the original part before installation. Drain coolant as needed, inspect adjoining pipes and clamps for wear, and confirm the hose seats fully on the heater outlet, tee, or pipe connection specified for your vehicle. For best results, route the hose without twist and check for clearance around nearby components after refill and warm-up.

Quality Assurance

Gates manufactures this molded heater hose in EPDM with an OEM-style formed profile for consistent routing and fit. The Gates 19770 is built to the dimensional and application requirements listed for select INFINITI and Nissan HVAC heater hose service.