Caliso 22178 Heavy Duty Thermal Fan Clutch

The Caliso 22178 Heavy Duty Thermal Fan Clutch is a direct-fit replacement cooling fan clutch engineered to restore proper engine temperature management. This heavy-duty thermal unit is designed to match the fit, form, and function of the original equipment fan clutch it replaces, delivering reliable performance under demanding conditions.

Thermal fan clutches use a silicone fluid-filled chamber and a bimetal thermal spring to modulate fan speed based on engine compartment temperature. When cooling demand is high, the clutch engages and drives the radiator fan at increased speed. When temperatures stabilize, the clutch partially disengages, reducing parasitic engine load and improving fuel efficiency.

Key Features:

• Heavy-duty thermal design for enhanced cooling performance over standard-duty units
• Silicone fluid coupling with bimetal thermal sensing spring for automatic temperature response
• Direct-fit replacement — no modifications required
• Engineered to match original equipment specifications for fit and function
• Helps prevent overheating during low-speed operation, towing, and high-load driving
• Reduces unnecessary fan drag when full cooling is not required, supporting fuel economy
• Cross-reference: 22178, 2656, 16210-50021, FCT-014, 36930

The Caliso 22178 is the correct heavy-duty thermal fan clutch for applications requiring a robust OE-replacement solution. Always verify fitment against your specific vehicle application before installation.