Four Seasons 58257 A/C Compressor

Overview of Four Seasons New Compressor 58257

The Four Seasons New Compressor 58257 is designed for reliable air conditioning performance in select GM vehicles. Engineered to meet the specifications of Buick, Oldsmobile, and Pontiac models, this A/C compressor supports efficient cooling with R134a refrigerant compatibility.

• Compatible with Buick Firenza, Oldsmobile J2000 Sunbird, Pontiac Skyhawk, and Sunbird
• Uses R134a refrigerant and Pag 150 compatible oil
• Includes oil-filled compressor and clutch assembly
• Features a pressure switch for high-pressure protection
• 12-volt coil with a 6 o'clock coil clock position
• Single-groove pulley designed for V-belt drive systems
• Type II metric thread mounting for secure installation
• Sealing washer discharge and suction ports with included O-rings

Four Seasons New Compressor Product Line Details

The New Compressor line from Four Seasons focuses on delivering brand-new, direct replacement A/C compressors that meet original equipment specifications. This ensures compatibility and performance for vehicles requiring a fresh compressor unit rather than a remanufactured part. The 58257 model exemplifies this approach by providing a fully oil-filled, pressure switch-equipped compressor designed for GM applications.

Technical Specifications and Features

This Four Seasons A/C compressor is designed for use with R134a refrigerant and compatible with Pag 150 oil, ensuring proper lubrication and system longevity. The included clutch assembly has a maximum diameter of 5.5 inches and operates on a 12-volt coil positioned at 6 o'clock for optimal fitment. The compressor features a single-groove pulley with a 5.5-inch diameter and a belt width of approximately 0.4375 inches (11.113 mm), compatible with V-belt drive systems common in the specified GM models.

Mounting is facilitated by Type II metric threads, with a mount distance of 21.59 mm (0.859375 inches) from clutch to mounting flange. Both discharge and suction ports utilize sealing washers, and two O-rings (part number 24354) are included to ensure leak-free connections. The compressor also includes a high-pressure switch with spade terminal type for electrical connection.

Applications and Common Issues Addressed

• Replacement for failed or leaking A/C compressors in Buick Firenza, Oldsmobile J2000 Sunbird, Pontiac Skyhawk, and Sunbird
• Restores proper refrigerant flow and pressure regulation in R134a systems
• Resolves clutch engagement problems with included clutch assembly
• Addresses oil contamination or depletion issues with oil-filled compressor design
• Fixes compressor noise or pulley wear with new pulley and coil components

Installation Notes and Tips

Ensure the vehicle’s A/C system is properly evacuated and flushed before installing the new compressor to prevent contamination. Use compatible Pag 150 refrigerant oil as specified. Verify the correct alignment of the single-groove pulley with the V-belt drive system. The high-pressure switch is included and should be connected using the spade terminal for proper operation. Note that mounting hardware is not included and must be sourced separately.

Quality Assurance and Warranty

The Four Seasons New Compressor 58257 is a brand-new unit manufactured to meet or exceed OEM standards for GM vehicles. It includes oil and a clutch assembly to ensure immediate compatibility and function. While specific warranty details are not provided here, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.