Gates 18346 HVAC Heater Hose - Heater Outlet or Heater To Thermostat

Reliable HVAC Heater Hose for Chevrolet Equinox and GMC Terrain

The Gates Molded Heater Hose 18346 is engineered to provide dependable heating system performance for select Chevrolet and GMC models. Designed with durable EPDM material, this molded heater hose ensures a precise fit and long-lasting service in your vehicle's HVAC system.

• Constructed from high-quality EPDM for heat and chemical resistance
• Molded design for exact fit and easy installation
• End 1 inside diameter: 0.63 inches (16 mm)
• End 2 inside diameter: 0.72 inches (18 mm)
• Centerline length: 20.3 inches (516 mm)
• Compatible with Chevrolet Equinox and GMC Terrain models

About the Gates Molded Heater Hose Product Line

The Molded Heater Hose line by Gates focuses on precision-engineered hoses that match original equipment specifications. These hoses are molded to exact dimensions, reducing the need for modifications during installation and ensuring reliable HVAC system operation. The 18346 part number is part of this line, offering a tailored solution for heating system hose replacement in Chevrolet Equinox and GMC Terrain vehicles.

Product Details and Specifications

This HVAC heater hose is made from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and automotive fluids. The molded construction provides a consistent shape that fits the HVAC system without leaks or kinks. The hose features two different inside diameters—0.63 inches (16 mm) on one end and 0.72 inches (18 mm) on the other—allowing it to connect seamlessly between components. With a centerline length of 20.3 inches (516 mm), it matches the original equipment dimensions for proper routing and function.

Common Applications and Issues Addressed

• Replacement of worn or cracked heater hoses in Chevrolet Equinox HVAC systems
• Resolving coolant leaks affecting heating performance in GMC Terrain vehicles
• Restoring proper coolant flow to the heater core
• Preventing overheating caused by damaged or collapsed heater hoses
• Maintaining HVAC system efficiency and cabin heating reliability

Installation Notes and Tips

Ensure the vehicle is cool before beginning installation to avoid burns from hot coolant. Verify hose routing matches the original configuration to prevent kinks or interference with other engine components. Use appropriate clamps to secure the hose ends firmly. The molded design of the Gates 18346 heater hose simplifies installation by providing a precise fit without the need for trimming or bending.

Quality Assurance and Warranty

Gates manufactures the Molded Heater Hose 18346 to meet or exceed OEM standards for durability and performance. The EPDM material and molded construction contribute to long service life under typical operating conditions. While specific warranty details are not provided here, Gates products generally come with a limited warranty against defects in materials and workmanship.