Four Seasons 36724 Severe Duty Thermal Fan Clutch

The Four Seasons 36724 is a reverse rotation severe duty thermal fan clutch designed to optimize engine cooling system performance. This precision-engineered clutch engages automatically based on underhood temperature, providing superior cooling when needed while improving fuel economy and reducing noise when full cooling isn't required.

Key Features:

• Severe duty thermal design operates at 80-90% of water pump shaft speed when engaged for maximum cooling efficiency
• Reverse rotation (counterclockwise) configuration for specific Ford applications
• Larger working surface area provides cooler operation and extended service life compared to standard duty clutches
• Bi-metal thermal spring automatically senses temperature and modulates fan engagement
• Precision machined components ensure proper fit and reliable performance
• Designed, tested, and validated by Four Seasons for OE performance and appearance

As part of the SMP Temperature Control Division, Four Seasons is the largest aftermarket mobile climate control parts supplier and the world's largest compressor remanufacturer. Each fan clutch undergoes rigorous testing and inspection before shipping to ensure quality and reliability. The thermal design responds to underhood temperatures via a bi-metal spring that opens valve ports to engage silicone fluid when cooling is needed, then disengages when temperatures normalize to reduce parasitic engine drag and improve fuel economy.

Cross-Reference Part Numbers: Motorcraft YB527, YB528, YB567, YB568, YB3049, YB3050; Ford F65Z8A616AB, F65Z8A616BB, F85Z8A616BA, 5L3Z8A616AB, AU2Z8A616JA; ACDelco 1580256; Hayden 2775; Balkamp 273389; and many others.