Caliso 22310 Electro-Viscous Engine Cooling Fan Clutch

The Caliso 22310 is an electro-viscous engine cooling fan clutch designed as a direct-fit replacement for vehicles equipped with electrically controlled viscous fan drive systems. Unlike traditional thermal bimetal fan clutches, an electro-viscous fan clutch uses an internal electromagnet controlled by the vehicle's powertrain control module (PCM) to precisely regulate fan engagement speed based on real-time engine cooling demands.

Key Features:

• PCM-Controlled Operation: Fan speed is modulated electronically by the vehicle's PCM, allowing variable engagement from free-spin to full lock-up as cooling conditions require
• Electro-Viscous Design: An internal electromagnet controls viscous fluid flow within the clutch housing, enabling smooth, progressive fan speed increases rather than abrupt engagement
• Direct-Fit Replacement: Engineered to match original equipment specifications for straightforward bolt-on installation with no modifications required
• Improved Cooling Efficiency: Precise electronic control optimizes fan operation, helping maintain consistent engine operating temperature under varying load conditions
• Fail-Safe Design: In the event of electrical system failure, the clutch defaults to a safe operating state to protect the engine from overheating
• Quality Construction: Built to meet or exceed original equipment performance standards for long-term reliability

The electro-viscous fan clutch is a critical cooling system component. A worn or failed unit can result in engine overheating, reduced A/C performance at idle, excessive fan noise, or diagnostic trouble codes related to fan speed. Replacing a faulty clutch with a quality direct-fit unit restores proper thermal management and helps protect connected cooling system components such as the water pump and radiator.