Dorman 626-638 HVAC Heater Hose Assembly - Outlet

Durable HVAC Heater Hose Assembly for Select GM Vehicles

The Dorman 626-638 HVAC heater hose assembly is designed to provide reliable coolant flow and heating performance for your Buick Montana, Chevrolet Uplander, Pontiac Relay, or Saturn Terraza. Engineered with quality materials and precise fitment, this molded hose assembly ensures efficient operation of your vehicle's heating system.

• Constructed from durable rubber and steel for strength and flexibility
• Includes three branches with consistent 0.49-inch inside diameter hoses
• Protective sleeve attached to resist abrasion and wear
• Comes with clamps for secure installation
• Maximum working pressure rated at 100 PSI
• Centerline length of 17.5 inches for accurate fitment
• Natural color molded assembly designed for OEM compatibility

Product Details and Specifications

This HVAC heater hose assembly by Dorman features a molded branched design with three hose ends, each having an inside diameter of 0.49 inches and an outside diameter of approximately 0.993 inches. The combination of rubber hose material and steel components provides durability and resistance to heat and pressure within the vehicle's heating system. The assembly includes a protective sleeve to guard against abrasion and comes with clamps to ensure a secure connection to the heater core and other HVAC components. With a maximum working pressure of 100 PSI, this hose assembly is suitable for regular grade applications in compatible GM minivans and crossovers.

Compatible Vehicles and Applications

This heater hose assembly is compatible with the following GM models:

• Buick Montana
• Chevrolet Uplander
• Pontiac Relay
• Saturn Terraza

Designed specifically for these vehicles, the Dorman 626-638 ensures proper fit and function within the HVAC system, helping maintain optimal cabin heating performance.

Common Issues Addressed by This Heater Hose Assembly

• Leaking or cracked heater hoses causing coolant loss
• Reduced heating efficiency due to damaged or worn hoses
• Coolant contamination from deteriorated hose materials
• Loose or failing hose connections leading to system pressure loss
• Overheating caused by restricted coolant flow in the heater core

Installation Notes and Tips

When installing the Dorman 626-638 heater hose assembly, ensure the engine is cool and the cooling system is depressurized. Use the included clamps to secure each hose end firmly to prevent leaks. Verify that the protective sleeve is properly positioned to avoid abrasion against engine components. Check for proper routing to avoid kinks or sharp bends that could restrict coolant flow. It is recommended to inspect related HVAC components during installation for any signs of wear or damage.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance and durability. This heater hose assembly undergoes rigorous quality control to ensure proper fit and function. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship. Refer to the product packaging or Dorman's official documentation for exact warranty terms.