Hayden 2778 Engine Cooling Fan Clutch

Hayden 2778 Heavy Duty Thermal Fan Clutch

The Hayden 2778 is a heavy duty thermal engine cooling fan clutch built for reverse-rotation applications. It is a non-electronic, severe-duty truck fan drive with an aluminum body, OEM-matching fitment details, and performance-rated construction for select Chevrolet Colorado, GMC Canyon, and Isuzu i-280/i-290 models.

Key Features

• Heavy duty thermal fan clutch for engine cooling control
• Reverse rotation design for listed applications
• Aluminum construction with raw aluminum finish
• Non-electronic clutch design
• Severe duty and truck fan drive style
• Meets or exceeds OEM requirements
• Performance rated for demanding cooling systems
• Hex mounting type with 4-bolt / 4-hole configuration
• Fan bolt circle: 3.25 in. (82.6 mm)
• Mount diameter: 1.44 in. (36 mm)

Product Details

Hayden Fan Clutch 2778 is engineered as a thermal viscous fan clutch for vehicles that rely on precise fan engagement to manage engine temperature. The 6.45-inch clutch diameter, 4.63-inch overall height, and 2.59-2.6-inch clutch-to-mounting-flange distance support the specified OE-style installation dimensions. This Hayden 2778 fan clutch is a direct-fit cooling component for reverse-rotation systems used on 2004-2012 Chevrolet Colorado, 2004-2012 GMC Canyon, 2006 Isuzu i-280, and 2007-2008 Isuzu i-290 applications.

The Hayden Fan Clutch line focuses on replacement cooling components for passenger and light truck applications, and this severe-duty truck fan drive follows that approach with a thermal, non-electronic design. This part cross-references Dorman - HELP 46017 for the same application.

Common Cooling Issues It Can Address

• Engine temperature running higher than normal at idle or low speed
• Fan engagement that feels inconsistent or delayed
• Cooling fan noise caused by a worn clutch mechanism
• Reduced airflow through the radiator and condenser
• Cooling performance loss in heavy-duty or truck-duty service

Installation Notes

• Verify reverse rotation before installation; this unit is specified for REV applications.
• Confirm the 4-bolt, 4-hole, hex-mount pattern and M10 x 1.5 hole thread specification.
• Check clearance using the listed pilot diameter, pilot depth, and overall height before final assembly.
• Mounting hardware is not included.
• Match the vehicle application exactly for Chevrolet Colorado, GMC Canyon, Isuzu i-280, and Isuzu i-290 fitment.

Quality Assurance

Hayden 2778 is a new, performance-rated fan clutch that meets or exceeds OEM specifications for the listed applications. Its heavy-duty thermal construction and OE-style dimensions support reliable replacement service in compatible cooling systems.