Caliso 22157 Standard Duty Thermal Engine Cooling Fan Clutch

The Caliso 22157 is a standard duty thermal engine cooling fan clutch designed as a direct-fit replacement for GM trucks, SUVs, and vans equipped with 4.3L V6 and 4.8L, 5.0L, 5.3L, 5.7L, and 6.0L V8 engines. This thermal fan clutch restores proper cooling system function and helps protect your engine from heat-related damage.

Thermal fan clutches use a bi-metallic spring to sense underhood temperature. When the engine is cool, the fan remains disengaged to reduce drag and improve fuel economy. As temperatures rise, the spring activates the valve plate, allowing silicone-based fluid to flow into the working area and engage the fan for maximum airflow through the radiator. Once the engine cools, the clutch automatically disengages again.

Key Features:

• Standard duty thermal design engineered to meet or exceed OEM specifications
• Silicone fluid-filled clutch chamber with bi-metallic spring activation
• Engages the cooling fan when engine temperatures rise and disengages when temperatures stabilize
• Helps reduce parasitic engine load and improve fuel efficiency when cooling is not needed
• Directly replaces worn or failed original equipment fan clutches
• Overall diameter: 7.2 in. (182.9 mm)
• Pilot diameter: 1.18 in. (30 mm)
• Mount diameter: 1.44 in.

Cross-reference part numbers include: 22157, 22158, 22624, 2744, 2744TA, 154542, 154558, 154559, 154560, 154564, 154565, 36772, 36945, FC140, GC494, 15022299, 15166906, 22135975, 22136731, 22149858, 22149894, 22150373, and 22150377.

Replacing a faulty thermal fan clutch is essential to preventing overheating, excessive engine noise, poor A/C performance, and reduced fuel economy. The Caliso 22157 provides a reliable, cost-effective solution for restoring your vehicle's cooling system to proper working order.