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Four Seasons 36780 Engine Cooling Fan Clutch
| Brand | Four Seasons 36780 |
|---|---|
| Bolt Hole Quantity | 4 |
| Bolt Thread | 5/16-18 Hole |
| Clutch Maximum Diameter | 7.2 |
| Clutch Type | B - Non-Thermal & Std Thermal |
| Color | Raw Aluminum in Color |
| Description | Fan Clutches |
| Dia. IN | 7.2 |
| Distance From Clutch To Mounting Flange | 1.62 |
| Distance From Clutch To Mounting Flange | 1.63 |
| 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 | 2.59 |
| Mount Dia. MM | 66 |
| Mounting Hardware? | Not Included |
| Mounting Hole Quantity | 4 |
| Mounting Type | Flange |
| New or Reman | New |
| Overall Dia. MM | 182.9 |
| Overall Height IN | 3.19 |
| Overall Height MM | 81 |
| Performance Rated? | Yes |
| Pilot Depth IN | 0.63 |
| Pilot Depth MM | 16 |
| Pilot Dia. IN | 0.75 |
| Rotation | STD |
| Style | Standard Duty |
| Type | Thermal |
| Use Type | Standard |
| Product line | Fan Clutch |
| Fits | Chevrolet · 8 vehicles |
OE direct replacement. Meets or exceeds OEM requirements for dependable cooling performance.
Aluminum construction. Lightweight, corrosion-resistant design with a raw aluminum finish.
Standard duty. Built as a thermal fan clutch for consistent engine cooling control.
Cross-references Anchor 2713, Febi-Bilstein 36780 and Gates 22050 for the same application. See all 12.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Engine Cooling Fan Clutch for Corvette
Four Seasons 36780 is a standard-duty engine cooling fan clutch built with an aluminum body and a flange mount for direct-fit service. It is a non-electronic, thermal fan clutch that meets or exceeds OEM requirements and is performance rated for dependable cooling control.
Compatible with 1969-1974 Chevrolet Corvette applications, this Four Seasons Fan Clutch line part is built for standard rotation setups and is sized for the specified mounting and pilot dimensions. If you are replacing a worn thermal fan clutch on a Chevrolet Corvette, 36780 provides the fitment and construction details needed for a straightforward replacement.
Key Features
- Four Seasons Fan Clutch, part number 36780
- Standard-duty thermal fan clutch design
- Aluminum construction with raw aluminum finish
- Non-electronic clutch for conventional cooling systems
- Flange mounting style with 4 bolt holes and 4 mounting holes
- Meets or exceeds OEM specifications
- Performance rated for cooling system service
- Standard rotation configuration
Product Details
Four Seasons 36780 is an engine cooling fan clutch designed to regulate fan engagement in thermal cooling systems. It features a 7.2-inch clutch diameter, 3.25-inch fan bolt circle, 2.59-inch mount diameter, and a 0.75-inch pilot diameter. The unit measures 3.19 inches in overall height and uses 5/16-18 bolt holes. This part cross-references Gates 22050 for the same application.
The Four Seasons Fan Clutch product line focuses on replacement cooling components for service work where correct rotation, mounting style, and thermal operation matter. For Chevrolet Corvette owners, part number 36780 is a direct replacement option for standard-duty thermal fan clutch service on listed 1969-1974 and 1970-1974 applications.
Common Problems This Part Can Address
- Fan clutch that no longer engages or disengages correctly
- Cooling fan noise caused by a worn clutch assembly
- Reduced airflow through the radiator at idle or low speed
- Overheating concerns tied to weak fan drive performance
- Excessive fan drag from a deteriorated thermal clutch
Installation Notes and Tips
Verify standard rotation, flange mounting, pilot diameter, and bolt pattern before installation. Mounting hardware is not included, so reuse or source the correct hardware as needed. Confirm clearance around the fan, clutch, and water pump area before final tightening, and match the replacement to the vehicle’s cooling system configuration.
Fits 1969-1971 Chevrolet Corvette, N/A. Fits 1970-1974 Chevrolet Corvette, N/A.
Quality Assurance
This Four Seasons fan clutch is a new replacement part that meets or exceeds OEM specifications and is performance rated for cooling system service. It is built for standard-duty use in thermal fan clutch applications.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1974 | Chevrolet | Corvette | 7.4L | V8 | N/A | Standard duty thermal fan clutch without AC, standard rotation.; Fan Clutch |
| 1973 | Chevrolet | Corvette | 7.4L | V8 | N/A | Standard duty thermal fan clutch without AC, standard rotation.; Fan Clutch |
| 1972 | Chevrolet | Corvette | 7.4L | V8 | N/A | Standard duty thermal fan clutch without AC, standard rotation.; Fan Clutch |
| 1971 | Chevrolet | Corvette | 5.7L | V8 | N/A | Standard rotation thermal engine cooling fan clutch compatible.; Fan Clutch |
| 1971 | Chevrolet | Corvette | 7.4L | V8 | N/A | Standard duty thermal fan clutch without AC, standard rotation.; Fan Clutch |
| 1970 | Chevrolet | Corvette | 5.7L | V8 | N/A | Standard rotation thermal engine cooling fan clutch compatible.; Fan Clutch |
| 1970 | Chevrolet | Corvette | 7.4L | V8 | N/A | Standard duty thermal fan clutch without AC, standard rotation.; Fan Clutch |
| 1969 | Chevrolet | Corvette | 5.7L | V8 | N/A | Standard rotation thermal engine cooling fan clutch compatible.; Fan Clutch |
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