Caliso 22077 Heavy Duty Thermal Fan Clutch

The Caliso 22077 is a heavy duty thermal fan clutch designed to meet or exceed original equipment manufacturer (OEM) specifications. This bolt-on replacement restores proper engine cooling performance by engaging and disengaging the radiator fan in direct response to underhood temperatures, helping prevent overheating while reducing unnecessary fan noise and parasitic power loss at lower engine temperatures.

The thermal fan clutch uses a bi-metal thermal spring mounted at the front of the unit to sense air temperature passing through the radiator. When temperatures rise, the clutch engages and spins the fan at a higher percentage of shaft speed to maximize airflow. Once temperatures stabilize, the clutch partially disengages to reduce drag on the engine and improve fuel efficiency.

Key Features:

• Heavy duty thermal operation for increased cooling capacity
• Bolt-on installation — no modifications required
• Meets or exceeds OEM fit, form, and function specifications
• Thermal engagement for improved fuel economy and reduced fan noise at lower temperatures
• High-quality bearing construction for long service life
• Cross-references: US Motor Works 22077, NAPA 274311, NPW T27F / T76F2, Toyota/Lexus/Scion 1621045090 | 1621041160 | 1621042030 | 1621045100, ACDelco 154915

The Caliso 22077 thermal fan clutch is a reliable, direct-fit replacement that restores OEM cooling system performance with a straightforward installation.