Four Seasons 26777 A/C System Valve Core and Cap Kit

AC System Seal Kit for A/C Service

Restore service access and sealing at the A/C ports with the Four Seasons AC System Seal Kit, part number 26777. This cap and valve A/C system seal kit is built for vehicles using R12 or R134a refrigerant and is a practical replacement for worn, missing, or damaged valve cores and service caps.

Four Seasons 26777 is a cap and valve kit with aluminum components and plastic caps in red, blue, and black for easy identification during A/C service. It is a direct-fit style solution for a wide range of import and domestic applications, including Audi A6, BMW 325i, and Ford F-150 models listed below.

Key Features

• Part number 26777 from Four Seasons AC System Seal Kit line
• Cap and valve core A/C service kit for HVAC hose and pipe service points
• Works with R12 and R134a refrigerant systems
• Aluminum construction with plastic service caps
• Cap colors include red, blue, and black for port identification
• Direct replacement style for common A/C valve core and cap service needs

Product Details

The Four Seasons AC System Seal Kit line focuses on sealing and service-point maintenance for automotive air conditioning systems. Part number 26777 is used where the A/C service port needs a new cap and valve core seal arrangement to maintain proper access and closure after refrigerant service. It cross-references Global Parts Distributors LLC 1311567 for the same application.

Compatible With select vehicles such as Fits 1995-2004 Audi A6, N/A; Fits 1987-1993 Ford F-150, N/A; and Fits 1987-1993 Toyota Camry, N/A. Additional coverage includes many Acura, BMW, Chevrolet, Dodge, GMC, Honda, Isuzu, Jaguar, Mazda, Mercedes-Benz, Nissan, Porsche, Subaru, Volkswagen, Volvo, and Tesla applications listed in the fitment data.

Common Issues This Part Addresses

• Broken or missing A/C service port caps
• Leaking or worn valve core sealing points
• Contamination entering the refrigerant service port
• Difficulty identifying high- and low-side service caps during maintenance
• Loss of proper closure after A/C recharge or repair work

Installation Notes and Tips

• Verify refrigerant type before service; this kit is listed for R12 and R134a systems.
• Inspect the service port threads and sealing surfaces before installing new caps or valve cores.
• Clean the port area to prevent debris from entering the HVAC system during replacement.
• Match the cap and valve core style to the vehicle’s original A/C service port configuration.
• Use the vehicle fitment list to confirm application before ordering.

Quality Assurance

Four Seasons supplies HVAC service components for automotive air conditioning repair and maintenance. Part number 26777 is cataloged as an AC System Seal Kit and is supported by broad fitment coverage across 1986-2016 vehicles in the listed applications.