Hayden 2594 Engine Cooling Fan Clutch

Thermal Fan Clutch for BMW Cooling Systems

The Hayden 2594 is a standard-duty thermal engine cooling fan clutch built for BMW applications that need controlled fan engagement and consistent cooling performance. With an aluminum body, non-electronic operation, and OEM-matching fit details, it is a direct replacement option for select BMW M3, Z3, 535i, M5, 735i, and 735iL models.

Hayden Fan Clutch 2594 is part of the Hayden fan clutch line, a cooling-focused product range for thermal fan drive applications. This unit uses a standard rotation, hex mounting type, and a 3-bolt fan pattern to match the specified import-style clutch configuration.

Key Features

• Thermal, standard-duty fan clutch for engine cooling control
• Aluminum construction with raw aluminum finish
• Non-electronic design for mechanical fan clutch applications
• 3-bolt mounting with M6 x 1.0 hole thread
• Fan bolt circle: 5.79 in. / 147.1 mm
• Clutch maximum diameter: 6.3 in. / 160 mm
• Overall height: 2.16 in. / 54.8 mm
• Meets or exceeds OEM requirements
• Performance rated

Detailed Description

Built as a standard-duty thermal fan clutch, the Hayden 2594 regulates fan engagement based on temperature to help maintain proper engine cooling. It features a 1.26 in. mount diameter, 0.94 in. pilot diameter, and 0.58 in. pilot depth, along with a 1.46 in. distance from clutch to mounting flange for the specified fitment. The design is intended for standard rotation and uses a hex mounting interface.

Fits 2001-2006 BMW M3, N/A; Fits 2001-2002 BMW Z3, N/A; Fits 1989-1993 BMW 535i, N/A; Fits 1991-1993 BMW M5, N/A; Fits 1987-1992 BMW 735i, N/A; Fits 1988-1992 BMW 735iL, N/A. This part cross-references Gates 22099 and Dorman - HELP 46002 for the same application.

Common Cooling Issues It Can Address

• Fan clutch that no longer engages at the proper temperature
• Excessive engine temperature during idle or low-speed driving
• Cooling fan noise caused by worn clutch internals
• Reduced airflow through the radiator at operating temperature
• Cooling system performance loss on BMW thermal fan clutch applications

Installation Notes and Tips

Verify the fan bolt circle, pilot dimensions, rotation, and mounting style before installation. Mounting hardware is not included, so reuse or source the correct hardware separately if needed. Confirm the vehicle uses a thermal, non-electronic fan clutch with the listed 3-bolt configuration before ordering.

Quality Assurance

Hayden 2594 is a new replacement fan clutch that meets or exceeds OEM specifications and is performance rated for the listed BMW applications. Its aluminum construction and OE-style dimensions support accurate fitment for select BMW cooling system repairs.