Continental 64393 HVAC Heater Hose - Engine To Heater or Heater To Pipe-2

Continental 64393 Heater Hose Overview

Continental 64393 is a molded HVAC heater hose for transferring glycol-based coolant between the heater core, bypass circuit, radiator, and related engine cooling components. Built to SAE 20R3EC Class D1 and D2 requirements, this hose is specified for vehicles that need a formed replacement with the correct routing and end sizes.

Use this Continental molded heater hose when servicing HVAC coolant lines on applications such as the Buick Rendezvous and Pontiac Aztek. The 64393 part number is also listed for Pontiac Montana and Oldsmobile Silhouette heater hose routing.

Key Features

• Molded HVAC heater hose for coolant transfer in heater and bypass circuits
• Inside diameter at Hose 1: 0.620 in.
• End 2 hose inside diameter: 0.750 in.
• Length: 22.200 in.
• Built to SAE 20R3EC Class D1 and Class D2 specifications
• Resistant to electrochemical degradation (ECR)
• Continental Molded line for formed hose routing

Detailed Description

Continental 64393 is a molded heater hose engineered for coolant flow to and from the heater core, through bypass passages, and across other cooling-system components. Its formed shape helps match the original routing on vehicles that require a molded HVAC heater hose rather than a universal straight hose. The 0.620-inch and 0.750-inch hose ends, along with the 22.200-inch length, make this part a direct-spec replacement for the listed applications.

This part cross-references Dayco 88425 and Gates 19287 for the same application. It is a strong match for owners searching for a heater hose for 2002-2005 Buick Rendezvous heater to pipe-2, 2001-2005 Pontiac Aztek heater to pipe-2, or 2005 Pontiac Montana engine to heater service. The 64393 part number is also associated with 2001-2004 Oldsmobile Silhouette and 2001-2004 Pontiac Montana heater hose routing.

What This Hose Helps Address

• Coolant leaks at a worn or cracked heater hose
• Restricted heater-core coolant flow from hose deterioration
• Incorrect hose routing after cooling-system repair
• Softening, swelling, or breakdown from heat and coolant exposure
• Electrochemical degradation in the cooling system

Installation Notes and Tips

Verify the molded shape, 0.620-inch hose end, 0.750-inch hose end, and 22.200-inch length against the original hose before installation. Confirm the vehicle position listed for your application, including Heater To Pipe-2 or Engine To Heater, since the fitment varies by model and year. For best results, inspect adjoining pipes, clamps, and heater-core connections for wear before replacing the hose.

• Fits 2002-2005 Buick Rendezvous, Heater To Pipe-2, Molded
• Fits 2001-2005 Pontiac Aztek, Heater To Pipe-2, Molded
• Fits 2005 Pontiac Montana, Engine To Heater, Exc Aux heater; Molded
• Fits 2001-2004 Oldsmobile Silhouette, Heater To Pipe-2, Molded
• Fits 2001-2004 Pontiac Montana, Heater To Pipe-2, Molded

Quality Assurance

Continental manufactures this hose to meet SAE 20R3EC Class D1 and D2 specifications and to resist electrochemical degradation, supporting durable performance in coolant-transfer service. The Continental Molded product line is built for formed-fit HVAC hose replacement where correct routing and material resistance matter.