Caliso 22074 Heavy Duty Thermal Engine Cooling Fan Clutch

The Caliso 22074 is a heavy duty thermal engine cooling fan clutch engineered to meet or exceed OEM specifications. Thermal fan clutches use a bi-metallic thermostatic coil that senses underhood air temperature passing through the radiator and automatically engages or disengages the cooling fan in response, delivering efficient engine temperature management without unnecessary parasitic drag on the engine.

This heavy duty unit features a finned aluminum faceplate and land-and-groove working surface design, providing greater fluid shear area than standard-duty clutches for increased cooling capacity. When fully engaged, the fan is driven at approximately 70–90% of shaft speed, ensuring aggressive airflow when the engine needs it most. When temperatures stabilize, the clutch partially disengages the fan to reduce noise, improve fuel economy, and extend belt and bearing life.

Key Features:

• Heavy duty thermal design meets or exceeds OEM performance specifications
• Bi-metallic thermal spring automatically regulates fan engagement based on underhood temperature
• Finned aluminum faceplate with land-and-groove impeller for high working surface area
• Compatible with deeper pitch fans (approximately 2-1/2" of pitch)
• Bolt-on installation for straightforward replacement
• Heavy duty bearing construction for long service life
• All-aluminum body aids in heat dissipation

The 22074 thermal fan clutch is a direct-fit bolt-on replacement designed to restore proper cooling system function. Its thermally responsive operation reduces engine load during highway driving and cold starts while providing maximum airflow during low-speed, high-heat conditions such as towing, stop-and-go traffic, and off-road use.