Hayden 6251 Engine Cooling Fan Clutch

Hayden 6251 Thermal Fan Clutch Overview

The Hayden 6251 is a standard duty thermal engine cooling fan clutch built with an aluminum body and a threaded shaft mounting design. It is engineered to meet or exceed OEM requirements and is performance rated for dependable cooling fan control on the 2001-2005 Audi Allroad Quattro.

As part of the Hayden Fan Clutch line, this thermal unit is designed for controlled fan engagement based on temperature, helping maintain consistent engine cooling performance in everyday driving conditions. The raw aluminum finish, 3-bolt mounting pattern, and standard rotation layout make it a direct-fit replacement for the specified application.

Key Features

• Thermal engine cooling fan clutch for temperature-based fan engagement
• Standard duty design for OE-style cooling system operation
• Aluminum construction with raw aluminum finish
• Threaded shaft mounting type with 3 bolt holes and 3 mounting holes
• Meets or exceeds OEM specifications
• Performance rated for verified cooling system use
• Standard rotation configuration
• Compatible with 2001-2005 Audi Allroad Quattro, N/A

Detailed Product Description

The Hayden 6251 fan clutch is a thermal replacement part for vehicles that rely on a mechanically driven cooling fan. It uses a standard duty, temperature-responsive design to regulate fan engagement as engine heat rises, helping support stable operating temperatures. Key dimensions include a 6.3-inch maximum clutch diameter, 2.29-inch overall height, 1.25-inch mount diameter, and a 5.79-inch fan bolt circle. The unit also features a 0.94-inch pilot diameter and 0.58-inch pilot depth for proper fitment in the specified cooling system.

This part cross-references Dorman - HELP 46101 and Gates 22099 for the same application. The Hayden 6251 is a direct replacement choice for 2001-2005 Audi Allroad Quattro models listed in the fitment data, and it is identified for standard rotation, thermal operation, and threaded shaft mounting.

Common Cooling Issues It May Address

• Engine cooling fan not engaging at the proper temperature
• Excessive fan noise from a worn clutch
• Inconsistent cooling performance during stop-and-go driving
• Overheating concerns related to fan clutch wear
• Reduced fan drive response in the cooling system

Installation Notes and Tips

Verify the threaded shaft mounting style, 3-bolt pattern, fan bolt circle, and pilot dimensions before installation. Confirm standard rotation and thermal clutch configuration against the original part on the vehicle. This part does not include mounting hardware, so reuse or source the correct hardware as needed for the application. For best results, inspect the fan assembly, belt drive components, and surrounding cooling system parts during replacement.

Fits 2001-2005 Audi Allroad Quattro, N/A.

Quality Assurance

The Hayden 6251 is a new thermal fan clutch built to meet or exceed OEM specifications and is performance rated for cooling system service. Its standard duty construction and application-specific dimensions support accurate replacement for the listed Audi Allroad Quattro fitment.