Hayden 2679 Engine Cooling Fan Clutch

Hayden 2679 Fan Clutch Overview

The Hayden 2679 engine cooling fan clutch is a standard-duty thermal replacement built for reverse-rotation applications. It uses an aluminum construction, a flange mount, and a non-electronic design to help maintain proper fan engagement in select Toyota and Lexus cooling systems.

Compatible with 2001-2005 Toyota Sequoia, 2003-2005 Toyota Tundra, 2003-2005 Toyota 4Runner, and 2003-2005 Lexus GX470 applications listed below, this Hayden fan clutch is a direct-fit service part for vehicles that require a reverse rotation thermal fan clutch. Hayden 2679 is also a common cross-reference for OE-style replacement searches on Toyota Tundra fan clutch and Lexus GX470 fan clutch applications.

Key Features

• Thermal, standard-duty fan clutch for engine cooling control
• Reverse rotation design for listed Toyota and Lexus applications
• Aluminum housing with raw aluminum finish
• Flange mounting style with 4 bolt holes and 4 mounting holes
• Non-electronic clutch design
• Meets or exceeds OEM requirements
• Performance rated for service replacement use
• Clutch maximum diameter: 6.65 in. (168.9 mm)
• Mount diameter: 3.63 in. (92 mm)
• Fan bolt circle: 5.35 in. (136 mm)

Detailed Description

Hayden Fan Clutch 2679 is a new thermal engine cooling fan clutch designed for reverse-rotation systems that rely on temperature-based fan engagement. The aluminum body, standard-duty construction, and flange mount support a direct replacement fit for select Toyota and Lexus trucks and SUVs. With a 6.65-inch clutch diameter, 3.28-inch overall height, and M6 x 1.0 bolt-hole thread specification, this part is built around the dimensions commonly used in import cooling fan assemblies.

This part cross-references Four Seasons 36776 and Gates 22184 for the same application. Search terms such as 2005 Toyota Tundra fan clutch replacement, 2004 Toyota 4Runner reverse rotation fan clutch, and 2003-2004 Lexus GX470 thermal fan clutch all point to the same service category covered by Hayden 2679.

Vehicle Fitment

• Fits 2005 Lexus GX470, N/A — Reverse Rotation; Standard Duty Thermal Fan Clutch; To 11/04
• Fits 2003-2004 Lexus GX470, N/A — Standard duty reverse rotation thermal fan clutch.
• Fits 2005 Toyota 4Runner, N/A — Standard Duty Thermal Fan Clutch
• Fits 2004 Toyota 4Runner, N/A — Reverse Rotation; Standard Duty Thermal Fan Clutch; To 11/04
• Fits 2003 Toyota 4Runner, N/A — Standard duty reverse rotation thermal fan clutch.
• Fits 2001-2004 Toyota Sequoia, N/A — Standard duty reverse rotation thermal fan clutch.
• Fits 2005 Toyota Sequoia, N/A — Reverse Rotation; Standard Duty Thermal Fan Clutch; To 8/05
• Fits 2003-2004 Toyota Tundra, N/A — Standard duty reverse rotation thermal fan clutch.
• Fits 2005 Toyota Tundra, N/A — Reverse Rotation; Standard Duty Thermal Fan Clutch; To 8/05

Installation Notes and Tips

• Verify reverse-rotation fan clutch requirements before installation.
• Confirm the fan bolt circle, mount diameter, and pilot dimensions against the removed part.
• Inspect the fan blades, water pump, and pulley alignment during service.
• Use the correct M6 x 1.0 threaded mounting points for the application.
• Mounting hardware is not included.

Quality Assurance

Hayden 2679 is a new, performance-rated fan clutch that meets or exceeds OEM specifications for the listed applications. Hayden’s Fan Clutch line is built for standard replacement service in cooling systems that require thermal fan engagement control.