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Hayden 2631 Engine Cooling Fan Clutch
| Brand | Hayden 2631 |
|---|---|
| Bolt Hole Quantity | 4 |
| Bolt Thread | M10 x 1.5 Hole |
| Clutch Maximum Diameter | 5.99 |
| Clutch Type | B - Non-Thermal & Std Thermal |
| Color | Raw Aluminum in Color |
| Description | Fan Clutches |
| Dia. IN | 5.99 |
| Distance From Clutch To Mounting Flange | 1.75 |
| Electronic Clutch? | Non Electronic |
| Fan Bolt Circle IN | 3.25 |
| Fan Bolt Circle MM | 82.6 |
| Material | Aluminum |
| Meets / Exceeds OEM? | Yes |
| Mount Dia. IN | 2.43 |
| Mount Dia. MM | 62 |
| Mounting Hardware? | Not Included |
| Mounting Hole Quantity | 4 |
| Mounting Type | Flange |
| New or Reman | New |
| Overall Dia. MM | 152.1 |
| Overall Height IN | 3.47 |
| Overall Height MM | 88.1 |
| Performance Rated? | Yes |
| Pilot Depth IN | 1.03 |
| Pilot Depth MM | 26.2 |
| Pilot Dia. IN | 0.63 |
| Rotation | REV |
| Style | Standard Duty |
| Type | Thermal |
| Use Type | Standard |
| Product line | Fan Clutch |
| Fits | Chevrolet, GMC, and Isuzu · 7 vehicles |
OE-spec replacement. Meets or exceeds OEM requirements for dependable cooling performance.
Aluminum construction. Lightweight material with a raw finish for a clean, durable look.
Standard-duty design. Built as a thermal fan clutch for consistent engine cooling control.
Cross-references Four Seasons 36766, Gates 22153 and Gates 22156 for the same application. See all 19.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Hayden 2631 Fan Clutch Overview
The Hayden 2631 fan clutch is a standard-duty, reverse-rotation thermal engine cooling fan clutch built for direct-fit service on select Chevrolet, GMC, and Isuzu applications. It uses an aluminum construction, a flange mount, and a non-electronic design to help maintain proper fan engagement in the cooling system.
Compatible with 1994-1996 Chevrolet S10, 1994-1996 GMC Sonoma, and 1996 Isuzu Hombre without A/C, this Hayden Fan Clutch line part is a practical replacement for reverse-rotation cooling setups. The Hayden 2631 is a new, performance-rated unit that meets or exceeds OEM requirements.
Key Features
- Brand: Hayden Fan Clutch
- Part number: 2631
- Standard-duty thermal fan clutch design
- Reverse rotation (REV) application
- Non-electronic clutch construction
- Aluminum body with raw aluminum finish
- Flange mounting style with 4-bolt pattern
- Meets or exceeds OEM specifications
- Performance rated for cooling-system service
Product Details
The Hayden 2631 is engineered as a B-type fan clutch for standard thermal and non-thermal applications. It features a 5.99-inch clutch diameter, 3.25-inch fan bolt circle, 2.43-inch mount diameter, and 1.75-inch distance from clutch to mounting flange. The unit uses an M10 x 1.5 bolt thread hole pattern and a 4-hole mounting layout for proper alignment in the cooling fan assembly.
This part cross-references Four Seasons 36766 for the same application. For buyers searching Hayden 2631, Hayden fan clutch 2631, or reverse rotation fan clutch for Chevrolet S10 and GMC Sonoma, this part number matches the listed fitment and cooling-system configuration.
Common Cooling Issues It Can Address
- Weak fan engagement at operating temperature
- Cooling fan noise caused by a worn clutch
- Reduced airflow through the radiator at idle or low speed
- Overheating concerns tied to fan clutch wear
- Inconsistent cooling performance in reverse-rotation systems
Installation Notes
Verify reverse-rotation fan clutch requirements before installation. This unit is listed for 1994-1996 Chevrolet S10, 1994-1996 GMC Sonoma, and 1996 Isuzu Hombre without A/C. Confirm the 4-bolt flange pattern, pilot dimensions, and fan bolt circle match the existing assembly before service.
Mounting hardware is not included. Use the correct fan and clutch alignment procedures for the vehicle’s cooling system, and inspect the fan blades, water pump, and radiator shroud during replacement.
Quality Assurance
Hayden identifies this fan clutch as a new, performance-rated replacement that meets or exceeds OEM specifications. The aluminum construction and standard-duty thermal design support consistent service in the listed applications.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1996 | Chevrolet | S10 | 2.2L | L4 | N/A | Reverse Rotation Standard Duty Thermal Fan Clutch without AC; Fan Clutch |
| 1996 | GMC | Sonoma | 2.2L | L4 | N/A | Reverse Rotation Standard Duty Thermal Fan Clutch without AC; Fan Clutch |
| 1996 | Isuzu | Hombre | — | — | N/A | Reverse Rotation Standard Duty Thermal Fan Clutch without AC; Fan Clutch |
| 1995 | Chevrolet | S10 | 2.2L | L4 | N/A | Reverse Rotation Standard Duty Thermal Fan Clutch without AC; Fan Clutch |
| 1995 | GMC | Sonoma | 2.2L | L4 | N/A | Reverse Rotation Standard Duty Thermal Fan Clutch without AC; Fan Clutch |
| 1994 | Chevrolet | S10 | 2.2L | L4 | N/A | Reverse Rotation Standard Duty Thermal Fan Clutch without AC; Fan Clutch |
| 1994 | GMC | Sonoma | 2.2L | L4 | N/A | Reverse Rotation Standard Duty Thermal Fan Clutch without AC; Fan Clutch |
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