Four Seasons 78493 A/C Compressor

Reliable A/C Compressor for Mitsubishi Eclipse, Endeavor, and Galant

The Four Seasons New Compressor 78493 is designed to restore efficient air conditioning performance in select Mitsubishi vehicles. Engineered for compatibility with R134a refrigerant, this A/C compressor ensures proper cooling and system reliability for the Eclipse, Endeavor, and Galant models.

• Compatible with Mitsubishi Eclipse, Endeavor, and Galant
• Uses R134a refrigerant and Pag 46 compatible oil
• Includes clutch and heat sensor switch for optimal operation
• Features a 6-groove serpentine pulley with 3.75-inch diameter
• O-ring sealed suction and discharge ports for leak prevention
• 12-volt coil with 1 wire lead for easy electrical connection
• Tangent mount type with precise mounting distance of 27.94 mm
• Oil filled and ready for installation

Four Seasons New Compressor Product Line Overview

The Four Seasons New Compressor line offers brand-new, direct replacement compressors designed to meet original equipment specifications. This product line focuses on delivering reliable performance and durability by including essential components such as the clutch and heat sensor switch. The New Compressor 78493 is part of this line, providing a complete solution for Mitsubishi A/C systems requiring a new compressor unit.

Detailed Product Description and Specifications

The Four Seasons 78493 A/C compressor is a MSC105C type unit specifically engineered for Mitsubishi vehicles using R134a refrigerant. It comes pre-filled with compatible Pag 46 oil to ensure proper lubrication and longevity. The compressor includes a clutch assembly with a maximum diameter of 3.75 inches and a 6-groove serpentine pulley designed for smooth belt engagement. The pulley diameter measures 95.25 mm, with matching lip and ridge diameters of 3.75 inches. Electrical connections are simplified with a 12-volt coil and a single wire lead positioned at the coil clock position. The compressor features O-ring sealed suction and discharge ports, using green O-rings (part numbers 24131 and 24679) to maintain a secure, leak-free seal. The mounting type is tangent mount with a distance from clutch to mounting flange of approximately 1.09 inches (27.94 mm). Note that mounting hardware is not included with this unit.

Common Applications and Problem Resolution

• Replacement for failed or leaking A/C compressors in Mitsubishi Eclipse, Endeavor, and Galant
• Restores proper air conditioning cooling performance
• Resolves clutch engagement issues due to worn or damaged clutch assemblies
• Addresses refrigerant leaks caused by faulty seals or ports
• Eliminates compressor noise or failure from internal wear

Installation Notes and Tips

• Ensure system is evacuated and flushed before installation to prevent contamination
• Verify compatibility with vehicle refrigerant type R134a and use Pag 46 oil as specified
• Check clutch air gap and pulley alignment during installation
• Replace O-rings with those provided or OEM equivalents to maintain proper sealing
• Confirm electrical connections match the 12-volt coil and pin terminal type

Quality Assurance and Warranty Information

The Four Seasons New Compressor 78493 is a new, direct replacement part manufactured to meet or exceed OEM standards. It includes essential components such as the clutch and heat sensor switch to ensure proper function. While mounting hardware is not included, the compressor is oil filled and ready for installation. Warranty coverage details should be confirmed with the product provider or manufacturer documentation.