Caliso 22325 Heavy Duty Thermal Fan Clutch

The Caliso 22325 is a heavy duty thermal fan clutch engineered as a direct-fit replacement for vehicles requiring precise, temperature-driven engine cooling. Thermal fan clutches automatically engage and disengage the engine cooling fan based on operating temperature, helping the engine reach optimal temperature quickly while reducing unnecessary load on the drivetrain.

How It Works:

The thermal fan clutch uses a silicone-based fluid sealed within the clutch housing and a bi-metallic thermal spring on the front face. When underhood temperatures rise, the spring reacts and allows fluid to flow into the working chamber, locking up the fan to deliver maximum airflow. Once temperatures stabilize, the clutch disengages, reducing parasitic drag and improving fuel efficiency.

Key Features:

• Heavy duty construction for demanding thermal and load conditions
• Temperature-responsive engagement for efficient, on-demand cooling
• Designed to meet or exceed original equipment (OE) specifications
• Direct bolt-on replacement — no modifications required
• Finned aluminum or steel faceplate with integrated thermal spring assembly
• Reduces engine noise, improves fuel economy, and prevents overheating

Why Replace Your Fan Clutch?

A worn or failed fan clutch can cause the engine to run hot at idle, reduce air conditioning performance, produce excessive fan noise, or cause the fan to spin at full speed constantly — all of which put additional stress on the engine and cooling system. Replacing a failed clutch with a quality unit like the Caliso 22325 restores proper cooling system operation and protects engine longevity.