Hayden 2798 Engine Cooling Fan Clutch

Hayden 2798 Severe Duty Thermal Fan Clutch

The Hayden 2798 is a thermal engine cooling fan clutch built for severe-duty use in Dodge Ram diesel applications. It uses a standard-rotation, non-electronic design with an aluminum body and OE-style mounting dimensions for direct replacement service.

Compatible with 1990-1999 Dodge D250, D350, W250, W350, Ram 2500, and Ram 3500 applications listed below, this Hayden Fan Clutch line part is built for truck cooling demands where consistent fan engagement matters. The Hayden 2798 also cross-references Monroe Shocks & Struts 272313 for the same application.

Key Features

• Severe-duty thermal fan clutch for truck cooling systems
• Standard rotation, non-electronic design
• Aluminum construction with raw aluminum finish
• 4-bolt / 4-mount-hole configuration
• Mounting type: HEX
• Clutch maximum diameter: 6.45 in. (163.8 mm)
• Fan bolt circle: 3.25 in. (82.6 mm)
• Meets or exceeds OEM requirements
• Performance rated for demanding cooling service

Product Details

The Hayden Fan Clutch brand line focuses on replacement cooling components for vehicles that need dependable fan control under load. Part number 2798 is a thermal severe-duty fan drive with a 1.44 in. mount diameter, 1.18 in. pilot diameter, and 0.7 in. pilot depth. Its 3.27 in. overall height and 1.25 in. clutch-to-mounting-flange distance support OE-style fitment on the Dodge Ram 2500 and Ram 3500 diesel cooling applications listed here, along with earlier Dodge D250, D350, W250, and W350 models with intercooler-equipped setups.

What It Helps Address

• Engine overheating caused by weak or inconsistent fan engagement
• Cooling fan slip in severe-duty towing or hauling conditions
• Noisy or worn thermal fan clutch operation
• Reduced airflow at idle or low vehicle speed
• Cooling system performance loss in Dodge Ram 2500 and Ram 3500 diesel trucks

Installation Notes and Tips

Verify standard rotation, bolt pattern, pilot dimensions, and fan bolt circle before installation. Mounting hardware is not included, so reuse or source the correct hardware as needed. Confirm clearance around the 6.45 in. clutch diameter and match the application to the listed Dodge D250, D350, W250, W350, Ram 2500, or Ram 3500 fitment before service.

• Fits 1997-1999 Dodge Ram 2500, N/A; Severe Duty Thermal Fan Clutch in Standard Rotation
• Fits 1997-1999 Dodge Ram 3500, N/A; Severe Duty Thermal Fan Clutch in Standard Rotation
• Fits 1994-1996 Dodge Ram 2500, N/A; Standard Rotation; Severe Duty Thermal Fan Clutch; w/ Intercooler
• Fits 1994-1996 Dodge Ram 3500, N/A; Standard Rotation; Severe Duty Thermal Fan Clutch; w/ Intercooler
• Fits 1990-1993 Dodge D250, N/A; Standard Rotation; Severe Duty Thermal Fan Clutch; w/ Intercooler
• Fits 1990-1993 Dodge D350, N/A; Standard Rotation; Severe Duty Thermal Fan Clutch; w/ Intercooler
• Fits 1990-1993 Dodge W250, N/A; Standard Rotation; Severe Duty Thermal Fan Clutch; w/ Intercooler
• Fits 1990-1993 Dodge W350, N/A; Standard Rotation; Severe Duty Thermal Fan Clutch; w/ Intercooler

Quality Assurance

Hayden lists this fan clutch as a new, performance-rated replacement that meets or exceeds OEM specifications for the confirmed applications. Part number 2798 is built as a severe-duty thermal unit for truck cooling service.