OE Quality
60-Day Returns

Four Seasons 66642 A/C Refrigerant Discharge / Suction Hose Assembly
Overview of Four Seasons Hose Assembly 66642
The Four Seasons Hose Assembly 66642 is designed specifically for the Buick Park Avenue HVAC system. This A/C refrigerant discharge and suction hose assembly ensures reliable performance with durable aluminum and rubber construction, compatible with R134a refrigerant.
- Constructed from aluminum and rubber for durability and flexibility
- Compatible with R134a refrigerant type
- Includes multiple O-rings and sealing washers for secure connections
- Features a flange discharge end and P-nut fitting suction end
- Equipped with a muffler and manifold block for noise reduction and system efficiency
- Includes gasket and seal components for proper installation
- OEM replacement part designed for Buick Park Avenue
Detailed Product Description
The Four Seasons Hose Assembly 66642 belongs to the Hose Assembly product line, which focuses on providing high-quality HVAC hoses and pipes engineered for specific vehicle applications. This assembly combines aluminum and rubber materials to withstand the pressures and temperatures of automotive air conditioning systems. It is designed to work with R134a refrigerant, the standard for many modern vehicles including the Buick Park Avenue.
This hose assembly includes a flange-style discharge end and a P-nut fitting suction end, ensuring a secure and leak-free connection to the vehicle’s A/C system. The included manifold block and muffler help reduce noise and vibration during operation. Multiple O-rings and sealing washers are provided to maintain system integrity and prevent refrigerant leaks. The assembly comes with a gasket and seal included, but does not include a bracket or switch.
Applications and Common Issues Addressed
- Replacement of worn or damaged A/C refrigerant discharge and suction hoses
- Eliminating refrigerant leaks caused by degraded seals or fittings
- Restoring proper refrigerant flow and pressure in the HVAC system
- Reducing noise and vibration from the A/C lines with the integrated muffler
- Ensuring compatibility with R134a refrigerant systems in Buick Park Avenue models
Installation Notes and Tips
- Verify compatibility with Buick Park Avenue before installation
- Ensure all included O-rings and sealing washers are properly seated to prevent leaks
- Use the included gasket and seal components during assembly
- Check for proper torque on flange and P-nut fittings to maintain system integrity
- Inspect the A/C system for any additional worn components during replacement
Quality Assurance and Warranty
The Four Seasons Hose Assembly 66642 is an OEM replacement part designed to meet or exceed original equipment specifications for the Buick Park Avenue. It includes all necessary seals and O-rings to ensure a proper fit and leak-free operation. While specific warranty details are not provided, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship.
| Brand | Four Seasons |
|---|---|
| Part Number | 66642 |
| Position | Hose Assembly |
| Bracket? | w/o Bracket |
| Discharge End Style | Flange |
| Discharge End Type | Flange |
| Friction Material Attachment | w/ Switch Port |
| Gasket Or Seal Included | Included |
| Manifold Suc Style | Block |
| Manifold? | Yes |
| Material | Aluminum / Rubber |
| Muffler? | w/ Muffler |
| O-Ring A Number/Desc | [24404] / Slimline Washer |
| O-Ring B Number/Desc | [24354] / Sealing Washer |
| O-Ring C Number/Desc | [24606] / Green O-Ring |
| O-Ring D Number/Desc | [24668] / Green O-Ring |
| O-Ring E Number/Desc | [24355] / Sealing Washer |
| O-Rings Included? | Included |
| O.E. Replacement? | Yes |
| Refrigerant Type | R134a |
| Service Port? | w/o Service Port |
| Suction End Style | P-Nut Fitting |
| Suction End Type | P-Nut Fitting |
| Switch Included? | Not Included |
| Type | Discharge & Suction Line |
This part fits 3 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2005 | Buick | Park Avenue | N/A | Hose Assembly |
| 2004 | Buick | Park Avenue | N/A | Hose Assembly |
| 2003 | Buick | Park Avenue | N/A | Hose Assembly |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.