Caliso 22331 Electro-Viscous Fan Clutch for Cummins Diesel Engines

The Caliso 22331 is an electro-viscous fan clutch engineered as a direct replacement for Cummins 5.9L and 6.7L diesel engines. This electronically controlled fan clutch optimizes cooling fan speed in response to real-time engine temperature signals, helping maintain consistent operating temperatures while reducing parasitic engine load.

Unlike traditional thermal fan clutches, the electro-viscous design uses an electromagnetic coil and viscous fluid to precisely control fan engagement under direction from the vehicle's ECU. The fan runs only when demanded, improving fuel efficiency during light-load or cool operating conditions.

Key Features:

• Electro-viscous (electronic) clutch design for precise ECU-controlled fan engagement
• CNC-machined construction to meet exact OE specifications
• All-aluminum body for efficient heat dissipation and reduced weight
• Heavy-duty bearings lubricated with high-temperature molybdenum grease
• Engineered and tested to meet or exceed original equipment specifications
• General application coverage, clutch specifications, and industry interchange data printed on label
• Sold individually

OEM Cross-References: 5505 6990AA, 5505 6990AB, 5505 6990AC

This electro-viscous fan clutch is a quality replacement designed to restore proper cooling system function on Cummins diesel-powered trucks, helping extend engine life and maintain optimal thermal efficiency.