Caliso 22329 Electro-Viscous Fan Clutch Engine Cooling Replacement

The Caliso 22329 is a direct-fit electro-viscous fan clutch designed to replace a failing or worn OEM engine cooling fan clutch. Unlike traditional thermal fan clutches that rely solely on temperature-sensitive bi-metal springs, an electro-viscous fan clutch uses an electronically controlled electromagnetic coil to manage viscous fluid flow within the clutch housing, enabling precise, demand-driven fan speed control commanded by the vehicle's ECU.

This design delivers more responsive cooling performance and improved fuel efficiency compared to conventional fan clutches, since the cooling fan only operates at full engagement when the engine truly demands it. The result is reduced parasitic drag on the engine during normal driving conditions.

Key Features:

• Electro-viscous design — electromagnetically controlled fluid coupling for precise, ECU-commanded fan speed management
• Direct OEM replacement — engineered to match original equipment mounting dimensions and electrical connector specifications
• Meets or exceeds OEM specifications — designed and tested to original equipment performance standards
• Improved cooling efficiency — fan engages only when demanded, reducing unnecessary engine load
• Application-specific engineering — clutch specifications matched to the target engine's cooling requirements
• Quality construction — built with high-quality internal components for long-term durability

The Caliso 22329 electro-viscous fan clutch is a straightforward bolt-on replacement for vehicles equipped with an OEM electronic fan clutch system. Proper installation restores factory-correct engine temperature management and eliminates symptoms such as overheating, excessive fan noise, or poor fuel economy caused by a failed fan clutch.