HomeHVAC > A/C Clutch and CompressorFour Seasons 58251 A/C Compressor
Part #: 58251

Four Seasons 58251 A/C Compressor

New Compressor
2 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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OE Direct Replacement — Bolt-on fit, no modifications needed
New Compressor
Fitment: Pontiac, Fiero
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Reliable A/C Compressor for Pontiac Fiero

The Four Seasons New Compressor 58251 is designed specifically for the Pontiac Fiero, providing efficient and dependable air conditioning performance. This new A/C compressor is engineered to meet the exact specifications required for optimal HVAC system operation in your vehicle.

  • Compatible with R134a refrigerant
  • Includes oil pre-filled with PAG 150 compatible refrigerant oil
  • Equipped with a high-pressure pressure switch
  • Features a single-groove V-belt pulley with a 5.75-inch diameter
  • Includes clutch assembly with a maximum diameter of 5.75 inches
  • 12-volt coil with a 10 o'clock clock position
  • Type II metric thread mounting for secure installation
  • Sealing washer type discharge and suction ports with included O-rings
  • Spade terminal type for electrical connections
  • New compressor unit, not remanufactured

Four Seasons New Compressor Product Line

The Four Seasons New Compressor line offers brand-new, factory-quality A/C compressors designed to restore your vehicle's air conditioning system to original performance. This product line focuses on delivering reliable, direct-fit replacements that include essential components such as the clutch and pressure switch, ensuring compatibility and ease of installation. The 58251 model is part of this line, tailored for the Pontiac Fiero with precise engineering to match OEM specifications.

Detailed Product Description

This Four Seasons New Compressor 58251 is an HR6 type compressor designed for use with R134a refrigerant and pre-filled with PAG 150 oil to ensure proper lubrication and longevity. The compressor includes a clutch assembly and a high-pressure pressure switch, both critical for safe and efficient operation. The pulley system features a single groove V-belt design with a 5.75-inch diameter, matching the original equipment for the Pontiac Fiero. The mounting uses Type II metric threads, and the coil operates at 12 volts with a coil clock position at 10 o'clock, facilitating proper alignment and electrical connection. The discharge and suction ports use sealing washers with included O-rings to prevent leaks and maintain system integrity.

Common Issues Addressed by This Compressor

  • Loss of A/C cooling due to compressor failure
  • Clutch engagement problems affecting air conditioning operation
  • Refrigerant leaks from worn or damaged compressor seals
  • Electrical issues related to coil or pressure switch malfunction
  • Noise or vibration caused by worn compressor components

Installation Notes and Tips

  • Ensure the system is properly evacuated and recharged with R134a refrigerant
  • Verify compatibility with the Pontiac Fiero model year before installation
  • Use the included O-rings and sealing washers to prevent leaks
  • Check belt alignment and tension on the single-groove V-belt pulley
  • Confirm electrical connections with spade terminals are secure and corrosion-free
  • Mount using Type II metric thread hardware (not included)

Quality Assurance and Warranty

The Four Seasons New Compressor 58251 is a brand-new unit manufactured to meet or exceed OEM standards. It includes essential components such as the clutch and pressure switch to ensure full functionality. While mounting hardware is not included, the compressor is designed for direct replacement in the Pontiac Fiero. Four Seasons products typically come with a limited warranty covering defects in materials and workmanship; please refer to the manufacturer’s warranty documentation for specific terms.

BrandFour Seasons
Part Number58251
PositionNew Compressor
Belt Width IN0.500
Belt Width MM12.700
Clutch IncludedIncluded
Clutch Maximum Diameter5.750
Coil Clock Position10
Coil Voltage12
Compatible Refrigerant Oil TypePAG 150
Compressor TypeHR6
Discharge Port TypeSealing Washer
Distance From Clutch To Mounting Flange1.203125
Mount Distance MM30.480
Mounting Hardware?Not Included
Mounting TypeType II Metric Thread
New or RemanNew
O-Ring A Number/Desc[24354] / Sealing Washer
Oil FilledIncluded
Pulley Belt TypeV-Belt
Pulley Diameter MM146.050
Pulley Groove Quantity1
Pulley Lip Diameter5.750
Pulley Ridge Diameter5.750
Refrigerant TypeR134a
Suction Port TypeSealing Washer
Switch IncludedHigh Pressure
Switch TypePressure Switch
Terminal TypeSpade
TypeGM

This part fits 2 vehicles. Search below:

YearMakeModelPositionNotes
1985PontiacFieroN/Aw/ DA6 Compressor; w/ HR6 Compressor; New w/ Clutch; w/ 5.7" Dia. Pulley; New Compressor
1984PontiacFieroN/Aw/ DA6 Compressor; w/ HR6 Compressor; New w/ Clutch; w/ 5.7" Dia. Pulley; New Compressor

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

11158251113150112322333142024127561058251620241A75610CWK620241T58251

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.