Four Seasons 78348 A/C Compressor

Overview of Four Seasons New Compressor 78348

The Four Seasons New Compressor 78348 is designed for reliable air conditioning performance in select Cadillac, Chevrolet, GMC, and Hummer vehicles. Engineered to work with R134a refrigerant and compatible with Pag 46 oil, this A/C compressor ensures efficient cooling and system longevity.

• Compatible refrigerant type: R134a
• Includes oil pre-filled for immediate installation
• 6-groove serpentine pulley for optimal belt engagement
• 12-volt coil voltage with 1 wire lead coil clock position
• Includes clutch assembly with a maximum diameter of 4.5 inches
• Tangent mount type for secure installation
• Pin-type electrical terminal for reliable connection
• Includes slimline washer O-rings for sealing
• Designed as a Nippondenso 10s17f compressor type

Four Seasons New Compressor Product Line Details

The Four Seasons New Compressor line offers brand-new, direct replacement compressors designed to meet or exceed original equipment specifications. The New Compressor 78348 is part of this line, providing a fully assembled unit with clutch and oil included, reducing installation time and ensuring compatibility with factory A/C systems in vehicles such as the Chevrolet Silverado 1500 and GMC Sierra 2500 HD.

Technical Description and Features

This Four Seasons A/C compressor features a 6-groove serpentine pulley with a diameter of 4.5 inches, matching OEM specifications for smooth belt operation. The compressor is pre-filled with the correct amount of Pag 46 oil, compatible with R134a refrigerant systems. The clutch assembly is included and designed with a maximum diameter of 4.5 inches, ensuring proper engagement and disengagement. The unit uses a pin-type terminal and a single wire lead coil clock position for straightforward electrical connections. The tangent mount design provides a secure fitment on compatible vehicles, including Cadillac DeVille and Hummer H1 models.

Compatible Vehicles and Applications

• Cadillac DeVille and Seville
• Chevrolet Express 1500, 2500, 3500
• GMC Sierra 1500, 2500 HD, 3500 Classic
• Hummer H1
• Chevrolet Silverado 1500 Classic and 3500 HD

This compressor is suitable for air conditioning system repairs or replacements where the original compressor has failed or is underperforming.

Common Issues Addressed by This Compressor

• Loss of A/C cooling due to compressor failure
• Clutch slipping or not engaging properly
• Refrigerant leaks from worn seals or O-rings
• Excessive noise or vibration from compressor wear
• Incompatibility with R134a refrigerant systems

Installation Notes and Tips

Installation requires removal of the old compressor and proper evacuation of the A/C system. The Four Seasons 78348 compressor comes pre-filled with Pag 46 oil and includes necessary O-rings, but mounting hardware is not included. It may require the use of the original equipment manifold for proper connection. Ensure the serpentine belt is aligned with the 6-groove pulley and verify electrical connections match the pin terminal and coil wire lead. Proper torque specifications should be followed for the tangent mount installation.

Quality Assurance and Warranty

The Four Seasons New Compressor 78348 is a new, direct replacement part manufactured to meet OEM standards. It includes pre-filled oil and clutch assembly to reduce installation variables. While specific warranty details are not provided here, Four Seasons typically offers limited warranties on their new compressor line to cover defects in materials and workmanship.