Hayden 2561 Engine Cooling Fan Clutch

Hayden 2561 Fan Clutch Overview

The Hayden 2561 is a standard-duty thermal engine cooling fan clutch built with an aluminum body and a non-electronic design. It uses a flange mount with a 4-bolt pattern and a 4.8 in fan bolt circle, making it a direct-fit style replacement for select import cooling systems.

Compatible with Isuzu Pickup, Isuzu Trooper, and Chevrolet LUV applications, this Hayden Fan Clutch line part number 2561 is built to meet or exceed OEM requirements while maintaining standard rotation and thermal engagement characteristics.

Key Features

• Thermal, standard-duty fan clutch for engine cooling control
• Aluminum construction with raw aluminum finish
• Non-electronic design for mechanical fan clutch systems
• Flange mounting style with 4 mounting holes and M6 x 1.0 threaded holes
• 5.85 in maximum clutch diameter and 2.63 in overall height
• Standard rotation configuration
• Meets or exceeds OEM specifications
• Performance rated for replacement use

Product Details

Hayden Fan Clutch 2561 is engineered for import applications that use a 5 in or 6 in clutch style. The 3 in mount diameter, 0.63 in pilot diameter, and 0.59 in pilot depth support proper alignment in the cooling fan assembly, while the 121.9 mm fan bolt circle helps match the original mounting layout. This part cross-references Four Seasons 36919 for the same application.

Fits 1981-1987 Isuzu Pickup, N/A; Fits 1984-1987 Isuzu Trooper, N/A; Fits 1975-1982 Chevrolet LUV, N/A. For search relevance, this Hayden 2561 fan clutch is commonly sought as a thermal fan clutch for Isuzu Pickup cooling repair and Chevrolet LUV engine cooling service.

Common Problems This Part Addresses

• Cooling fan not engaging at the proper temperature
• Engine running hotter than normal in stop-and-go driving
• Excessive fan noise from a worn clutch
• Reduced airflow through the radiator at low vehicle speed
• Cooling system performance loss on thermal fan clutch applications

Installation Notes

Verify the fan bolt circle, mount diameter, pilot dimensions, and rotation before installation. This Hayden 2561 uses a flange mount and does not include mounting hardware, so reuse or source the correct fasteners as needed. Confirm that the vehicle uses a standard-duty thermal fan clutch setup and that the fan assembly matches the 4-bolt, M6 x 1.0 threaded pattern.

Quality Assurance

This Hayden Fan Clutch is a new part built to meet or exceed OEM specifications and is performance rated for replacement use. It is intended for direct replacement in confirmed fitment applications, including Isuzu Pickup, Isuzu Trooper, and Chevrolet LUV cooling systems.