Four Seasons 26778 A/C System Valve Core and Cap Kit

Reliable A/C System Seal Kit for GM Vehicles

The Four Seasons AC System Seal Kit 26778 is designed to maintain the integrity of your vehicle's air conditioning system. Compatible with a wide range of GM makes and models, this kit includes essential valve cores and caps to ensure a secure, leak-free seal.

• Compatible with refrigerants R12 and R134a
• Includes durable aluminum valve cores and plastic caps
• Caps available in red and blue for easy identification
• Designed specifically for GM vehicles including Chevrolet, GMC, Buick, and Cadillac
• Part number 26778 for precise fitment and replacement

About the Four Seasons AC System Seal Kit Line

The AC System Seal Kit line from Four Seasons focuses on providing reliable sealing components for automotive air conditioning systems. This kit includes both valve cores and caps made from quality materials like aluminum and plastic, engineered to prevent refrigerant leaks and maintain system pressure. The kit supports both R12 and R134a refrigerants, making it suitable for a variety of older and newer GM vehicles.

Product Details and Specifications

This A/C System Valve Core and Cap Kit features aluminum valve cores and plastic caps with specific inside diameters to ensure a tight seal. The caps come in red and blue colors to help distinguish between high and low-pressure service ports. The kit is compatible with refrigerants R12 and R134a, covering a broad range of air conditioning systems. It is designed for use on multiple GM makes including Buick, Cadillac, Chevrolet, GMC, Oldsmobile, and Pontiac, and fits numerous models such as the Chevrolet Silverado, GMC Sierra, Cadillac Escalade, and Pontiac Grand Prix.

Common Applications and Issues Addressed

• Prevents refrigerant leaks from valve cores
• Replaces worn or damaged valve caps to maintain system pressure
• Helps avoid contamination and moisture entry into the A/C system
• Supports proper refrigerant retention for efficient cooling
• Restores sealing integrity on GM vehicles with R12 or R134a systems

Installation Notes and Tips

When installing the Four Seasons AC System Seal Kit 26778, ensure the correct valve core and cap are used for the corresponding service port. Use appropriate tools to remove and install valve cores without damaging the valve stem. Verify that the caps are securely tightened to prevent leaks. This kit is designed for professional or experienced DIY installation on compatible GM vehicles.

Quality Assurance and Warranty

Four Seasons manufactures this AC System Seal Kit with durable aluminum and plastic materials to meet OEM standards. The kit is engineered for long-lasting performance in automotive HVAC systems. While specific warranty details are not provided, Four Seasons products typically come with a limited warranty against defects in materials and workmanship.